Tolumnia latipes (Dallas)

Kaur, Ravneet, Singh, Devinder & Kaur, Harbhajan, 2017, Morphotaxonomy and external genitalia of three species of genus Tolumnia Stål (Heteroptera: Pentatomidae) from north India, Journal of Entomology and Zoology Studies 5, No. 1, pp. 1-6 : 4-5

Tolumnia latipes (Dallas)

(Fig. 3 A)

Pentatoma latipes, Dallas (1851) [ 2] List Hem., 1: p. 238.

Dalpada obtusicollis, Ellenr. (1862) [ 4] Nat. Tijdschr. Ind., 24: p. 143.

Pentatoma trispila, Walker (1867) [ 9] Cat. Het., 2: p. 302.

Var. Pentatoma contingens, Walker. loc. cit. p. 302.

Tolumnia latipes: Breddin (1900) [ 1] Abh. Naturforsch. Ges. Halle. 24: p. 298.

MALE: Measurements (mm): Head length: 1.70; width across eyes: 1.90; interocular space: 1.90; interocellar space: 0.90; preocular distance: 0.60; length of posterior head including eyes: 0.90; antennal segments lengths: I: 0.50, II: 0.90, III: 1. 0, IV: 1.20, V: 1.65; pronotal length: 2.20; width across humeral angles: 5.61; scutellar length: 4.0; scutellar width: 3.60; length of abdomen: 4.375; maximum width of abdomen: 5.61; length of rostral segments: I: 0.85, II: 1.20, III: 0.95, IV: 0.85; Distance - base scutellum-apex clavus: 2.50; apex clavus-apex scutellum: 1.25; apex scutellum-apex abdomen including membrane: 3.0; total body length: 8.50.

Dorsal Coloration: Head shining black, with irregular obscure brownish yellow spots and thick lamelliform black punctures; a median longitudinal line, levigate deep brownishyellow; concolorous small spots just behind eye; eyes reddish black; ocelli bright red; antennae multicoloured, 1st segment brownish black, 2nd and 3rd yellowish brown, 4th and 5th black, except base of 4th and basal half of 5th deep brownish yellow; pronotum dark chocolate brown, thickly punctured with black and obscure brownish yellow irrorations, anterior area with two yellowish brown impunctate transverse callosities, anterolateral margins levigate, brownish yellow, rest black, tip of humeral angle pale yellow; scutellum chocolate brown with black punctures, and few brownish-yellow irrorations, base of scutellum with three levigate pale spots (one central, two angular), apex broadly levigate, deep brownish yellow; clavus and corium slightly paler than scutellum with maculate concolorous spots, a large brownish-yellow spot just at the tip of suture between corium and costa, anteriormost portion of costa pale, impunctate; connexiva paler, impunctate with anterior and posterior margins blackly punctate; hemelytral membrane brownish, outer margins transparent, veins darker.

Ventral Coloration: Labium pale brownish yellow, apex black; head with lateral edges black, lateral areas pale yellowish-white; sternum with three black spots, each at base of coxae one small black spot just below anterior margin of mesosternite; humeral angles black; metathoracic scent gland peritreme and evaporatorium pale brownish-yellow and finely punctate; abdomen deep brownish-yellow and scarcely punctured with fine punctures; connexiva pale brownishyellow alternating with broad impunctate black anterior and posterior margins, posterior connexival angles black; spiracles yellow bordered with dark brown; legs deep brownish-yellow spotted with black, apex of femora, base and apex of tibiae and entire tarsi black; genital capsule brownish-yellow.

Structure

Head (Fig.3 B): Head slightly wider than long, moderately deflected, subrounded at apex; paraclypeal lobes subequal to slightly lobulated clypeus; former very slightly sinuate above eyes, anterolaterally reflexed upwards and narrowed at apex; 1st antennal segment not reaching apex of head. Antennal segmental formula – I<II<III<IV<V; labium long, reaching metacoxae, labial lengths formula – I=IV<III<II. Thorax: Pronotum (Fig.3 C) slightly deflected anteriorly, raised medially, anterior margin concave, truncated behind eyes, produced as small tuberculate spines directed antero-laterad, lateral margins obscurely sinuate, humeral angles subprominent, obtuse; scutellum as long as broad, raised anteriorly, apically flattened and distinctly narrowed as subrounded apical lobe beyond frenal region; metathoracic scent gland osteolar peritreme (Fig. 3 D) long, broad at orifice, narrowed acutely at apex, reaching three fourth way to metapleural margin; evaporatorium well defined, broad, subequally extended anterior and posterior margins, deeply concave medially, covering large area of sternite. Abdomen: slightly calloused, flattened laterally; connexivum well exposed at repose dorsally and ventrally; legs with tibiae and tarsi pilosed; genital capsule with golden pubescence; ventral anterior and ventroposterior margin of abdominal sternite VIIth deeply concave, somewhat an inverted V-shaped with subacute angles (Fig.3 E); hemelytral membrane passing moderately beyond abdominal apex.

Female

Measurements (mm): Head length: 1.70; width across eyes: 1.90; interocular space: 1.90; interocellar space: 0.60; preocular distance: 0.80; length of posterior head including eyes: 0.90; antennal segments lengths: I: 0.50, II: 0.90, III: 1. 0, IV: 1.20, V: 1.65; pronotal length: 2.20; width across humeral angles: 5.61; scutellar length: 4.0; scutellar width: 3.60; length of abdomen: 4.37; maximum width of abdomen: 5.61; length of rostral segments: I: 0.85, II: 1.20, III: 0.95, IV: 0.85; Distance - base scutellum-apex clavus: 2.50; apex clavus-apex scutellum: 1.25; apex scutellum-apex abdomen including membrane: 3.0; total body length: 9.0.

Coloration and Structure: Body coloration and form similar to males except, ventral anterior margin of abdominal sternite VIIth concave with acute posterior connexival angles and ventroposterior margin broadly concave (Fig. 3 F).

Female Genitalia: 1st gonococcie broad, quadrangular, 2nd gonococcie short, anterior and posterior margin concave; 8th paratergites triangular with small acute spines at posterior margin; 9th paratergites lobulate, rounded at posterior margin, reaching fused posterior margin of 8th paratergites (Fig.3 G); spermatheca (Fig.3 H) with distinct distal and proximal flanges; pump region small, tube like, spiral; bulb squarish with two small finger like processes; proximal spermathecal duct slightly longer than distal spermathecal duct.

Male Genitalia: Pygophore (Fig. 3 I) broader than long, somewhat U-shaped, with well developed dorsolateral lobes, broadly rounded at apex; ventroposterior margin sinuate and concave; dorsal opening extremely large; paramere (Fig.3 J) L-shaped, without any projection, inner margin concave with small notch near base; aedeagus (Fig.3 K,3 L) with theca unilobed, rectangular, with elongated nod like medial penial lobes, dorsal membranous conjunctival appendages; vesica moderately long, not passing beyond distal appendages; ejaculatory reservoir broad.

Material Examined

Uttarakhand: Dehradun , 24. vi. 2010 - 1♀ , Sahastradhara, 16.ix. 2010 - 1♀ , Mussoorie , 16. ix. 2010 – 1Ô

Distribution: Myanmar; India (Uttarakhand, Paschim Banga, Sikkim, Meghalaya, Nagaland).

Remarks: This species closely resembles to T. maxima in having humeral angles not produced and in general body shape, but can be easily separated on the basis of few morphological and female genitalic attributes as discussed earlier. It is a new record from North India.