168 



Eighteenth Report State Entomologist of Minnesota — 1920 



vertex by a groove ; front broadly convex, shining, finely pilose ; pale to testa- 

 ceous and brownish, bordering front margin of eye, transverse bars each side 

 of front and fusing below in a spot at base of tylus, slender apex and gem- 

 inate mark on tylus, juga, dorsal margin of lorae, spot beneath eye and more 

 or less at base of bucculae, black or brownish black. Rostnnii. length 2.37 

 mm., reaching upon middle of hind coxae, brownish, becoming piceous at base 

 and apex. 



Antoinac : segment I, length .35 mm., brownish; II, 1.28 mm., tapering grad- 

 ually larger from base toward apex but scarcely attaining the thickness of 

 segment I, yellowish to brownish, darker on the apical one-fourth, pale pubes- 

 cent, length of exserted hairs equal to twice greatest thickness of segment ; 

 III. .54 mm.; IV, .45 mm.; last two segments brownish to fuscous. 



Pro)iotu}ii: length 1.25 mm., width at base 1.54 mm., anterior angles 1 

 mm., collar .74 mm. ; disk moderately convex, coarsely black punctate, lateral 

 margins distinct, slightly sinuate, anterior angles slightly rounded ; calli mod- 

 erately convex, separated at basal margin by a pair of deep punctures, dark 

 brownish to black, basal margin with a projecting spot at lateral angle, a black 

 arc extending from antero-lateral angle to front margin of disk ; disk gray- 

 ish testaceous and darkened with brownish, shining, pale just before the calli; 

 propleura testaceous, finely black punctate, black just aliove and in front of 

 coxal cleft; xyphus slightly convex, infuscated, longly pale pubescent. Scit- 

 tclhiiii convex, shining, sometimes transversely rugulose on basal half, clothed 

 with long pilose hairs, brownish black, basal angles and apex pale or ivory- 

 white, the median line sometimes palely indicated on apical half. Sternum and 

 pleur:. dark brownish to blackish, pleural sclerites usually more or less pale 

 around the margins ; ostiolar peritreme white, sometimes becoming yellowish. 

 Hoiiclytra : width 2.48 mm., embolar margin slightly arcuate ; moderately 

 convex, clothed with erect pilose hairs, yellowish brown, somewhat translu- 

 cent, punctures black, apical half of corium becoming piceous in well-matured 

 specimens. Ciiiicus yellowish translucent, jiunctures infuscated, apical half dark 

 brownish to blackish. Membrane pale to fumate, apical half, veins, and more 

 or less invading membrane each side, infuscated. 



Legs: thickly clothed with prominent erect hairs, reddish brown, tips of 

 coxae, trochanters, and bases of femora paler ; hind femora with a pale band 

 before apex but usually incomplete on lower side ; tibiae with a distinct pale 

 annulus on apical half, two narrow and poorly defined pale annuli on the 

 basal half, the pale band at middle of basal half usually incomplete on the 

 dorsal side, the dark color usually distinctly reddish; tarsi brownish black, 



claws simple ; arolia bristle-like, trans- 

 lucent, erect, inclined slightly forward, 

 nearly parallel but converging slightly 

 at tips. 



Winter: dark reddish brown to black- 

 ish, shining, longly pale pubescent; 

 genital claspers (fig. 30) distinctive of 

 ^'ulve^Cens'Reut the species. 



9- Length 5.2 mm., width 2.4 mm.. 



Fig. 30. Deraeocorix julveacenii, m'As ■ -i i, ii „i •„ t „., J 



genifal claspers. a. left clasper. lat- very smidar to the male m form and 



eral aspect; b, internal arm of left color; segment II, length 1.34 mm., 



clasper ; c, right clasper, lateral as- ° , , • , , i 



pect. slender, enlarged slightly at apex, rather 



