Deraeocoris (Heteroptera. Miridae) 



165 



coarse!}- near the dorsal margin ; xyplnis nearly flat, infnscated on the disk, 

 pale pubescent. Sciitclluiu moderately convex, shining, im])unctate but trans- 

 versely rugulose on basal half, minutely pubescent, black, basal angles and 

 apex pale to ivory-white, apical half of median line frequently pale; mesoscu- 

 tum moderately exposed, black, minutely pubescent. Stcrnuin black, opaque, 

 median line and spot at base of middle coxae pale ; pleura black, margins of 

 sclerites more or less pale, opaque except for spot at dorsal margin of meso- 

 and meta-episterna ; ostiolar peritreme vi^hite, slightly infuscated at dorsal 

 margin. 



Hcinclytra: width 2.74 mm., elongate, embolar margins nearly parallel, mod- 

 eratel}' convex ; background pale translucent, coarsely and irregularly black punc- 

 tate, corium with spot at base, middle, and irregularly across apex, outer edge 

 and tip of embolium, black. Cuneus rather elongate, moderately deflexed, pale, 

 black punctate, the apical half black. Mcinbraue distinctly elongated, strongly 

 infuscated, spot at tip of cuneus and extending more or less to the middle, 

 within the areoles except at margins, pale; veins more heavilv infuscated, the 

 dark color invading the membrane somewhat on each side. 



Legs: fuscous to blackish, tips of coxae and the trochanters paler; basal 

 half of hind femora more or less pale, two or three rows of fuscous points per- 

 sisting on the anterior face ; tibiae biannulate with pale, frequently obscured with 

 reddish or brownish ; claws not at all cleft, dusk\' translucent, arolia similar 

 to those of pinicola. 



Venter: black, shining, clothe:! 

 with prominent pale pubescence ; 

 in paler forms flecked with red- 

 disli, the genital segment, more 

 or less at base and a row of 

 spots on sides, black; genital clas- 

 pers (fig. 28) distinctive of the 

 species. 



9. Lengtli 6.1 mm., width 2.85 

 mm. ; very similar to the male 

 in coloration but in form less 

 elongate; segment II, length 1.74 

 mm., moderately slender, thickened on the apical one-fourth but scarcely at- 

 taining the thickness of segment I. exserted hairs very prominent, length of 

 those on basal half equal to three times the thickness of segment at middle, 

 pubescence restricted chiefly to the enlarged apical one-fourth; III, .71 mm.; 

 IV, .57 mm., all the segments black; venter brownish to black, in paler forms 

 the black color develops first as a lateral line below the spiracles, on the gen- 

 ital segments and vagina exterior, the paler parts tinged with reddish. 



Holotype: $ June 27, Ithaca. New York ( H. H. Kniq-Jit); au- 

 thor's collection. Allotype: taken with the type. Paratypes : 265 

 295 taken with the types on Larix lariciiia. from the trees which grow 

 on the north slope of the water reservoir on the Cornell University 

 campus. MINNESOTA.— 5 July. 1914. Lake Itasca (S. A. (iraham). 

 NEW YORK.— 5 June 23, 2S July 1. 29 July 7, IS 59 July 14, Ba- 

 tavia; S lune 16. c? June 28. 6S 69 lulv 2, Ithaca ( H. H. Knight). 



laricicola 



Fig. 28. Diyaeororis laricicola, male genital 

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

 ternal arm of left clasper ; c, right clasper, lateral 

 aspect. 



