Deraeocoris ( Heteropter.\, Miridae) 



135 



tex, triangular spot at base and two longitudinal lines and apex of t\lus, above 

 and below base of antenna, gula, bucculae, dorsal margin of lorae, and some- 

 what on juga, fuscous to black. Rostrum, length 2.15 mm., scarcely attaining 

 the posterior margins of the middle coxae, j^ellowish brown, darker at apex, 

 basal segment blackish each side at middle. 



Antennae: segment I, length .48 mm.; II. 1.48 mm., slender at base and 

 gradually thickened toward apex, equaling the thickness of segment I, pale 

 pubescent, length of longest hairs not equal to more than thickness of segment 

 on apical half: III, .63 mm.; IV, .45 mm.; all the segrrients fuscous to blackish, 

 segment III paler at base. 



Pronotum: length 1.42 mm., width at base 2.39 mm., anterior angles 1 mm., 

 collar .8 mm. ; disk more closely punctate than in borealis or fasciolus, punc- 

 tures delimiting posterior margins of calli more or less confluent, lateral 

 margins slenderlj' carinate and perceptibly sulcate ; calli slightly convex, sepa- 

 rated by two closely set punctures at the median line, black, a lunate mark at 

 the antero-lateral angles ; grayish testaceous and more or less darkened with 

 fuscous and black, the median line and the sublateral area of disk usually 

 slightl}- paler ; propleura blackish, dorsal, posterior and ventral margins more 

 or less pale; xyphus pale to blackish. Scutellum smooth, convex and shining, 

 brownish black, basal angles, apex, and median line pale. Sternum opaque, 

 black, basalar plate yellowish to brown ; ostiolar peritreme pale, becoming black- 

 ish above. 



Hem-elytra : w-idth 2.9 mm., lateral margins verj- slightly arcuate ; grayish 

 translucent and darkened with fuscous and blackish, clavus darker along the 

 sutures and at apex ; embolium except at apex, spot at base of corium and 

 bordering the embolium except at apex, pale translucent ; spot at middle and 

 more or less broadh* on the outer apical area of corium piceous or black, 

 punctures black. Cuneus pale translucent, punctures and apex black. Mem- 

 brane pale fumate, apical half usually distinctly infuscated, brachium and more 

 or less invading the membrane each side, fuscous. 



Legs: pale, femora biannulate with fuscous or blackish on the apical half, 

 frequenth- obsolete on the front pair ; tibiae triannulate with fuscous or black- 

 ish, the apical annulus usually paler ; tarsi pale to brownish, infuscated on 

 apices ; claws brownish translucent, arolia tj^pical of the group. 



Venter: black, shining, some- 

 times with brownish near lateral 

 margins, pale or j-ellowish pubes- 

 cent ; genital claspers (fig. 13) 

 distinctive of the species, the long 

 horn at the dorsal margin of the 

 left clasper taken in combination 

 with the comparativeh- slender in- 

 ternal arm is quite different from 

 any other known species. 



9. Length 6.1 mm., width 3 

 mm., verj- similar to the male in 

 structure and coloration ; segment 

 II. length 1.51 mm., slender, grad- 

 ually thickened toward apex, scarcely equal to thickness of segment I. pale 



aphidlph oqu3 



Fig. 13. Deraeocoris aphidiphagus, male geni- 

 tal claspers. a, left clasper, lateral aspect ; b, in- 

 ternal arm of left clasper ; c, right clasper, lat- 

 eral aspect. 



