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ElGHTEEXTH RePORT StATE ENTOMOLOGIST OF MINNESOTA — 1920 



betulc 



oe 



Fig. 10. Deraeocoris hetulae, male genital claspers. 

 a, left clasper, lateral aspect : b, internal arm of left 

 clasper ; c, right clasper, dorsal and lateral aspect. 



Hemclytra : width 3.1 mm., structurally very similar to fasciolus; rather 

 uniformly dark brownish or brownish black. Cuncus brow-nish black, punctures 

 evident, slightly paler and translucent on the central area. Membrane strongly 

 infuscated, a transverse pale area behind the areoles but usually interrupted 

 at middle ; the large fuscous spot occupying the apical half irregularly trans- 

 verse at base, not so clearly rounded at the sides as in the case of fasciolus. 



Legs: black, apical half of coxae, trochanters, and bases of femora more 

 or less pale; tibiae black, paler at knee, annulus at middle of basal half and 

 a much broader one just be3'ond middle of tibiae, pale; tarsi black, the second 

 segment and base of third frequently paler ; claws brownish to blackish, arolia 

 slender, translucent, bristle-like, nearly parallel but converging slighth' at apices. 



Venter: dark reddish 

 brown to chestnut red or 

 mahogany and piceous, shin- 

 ing, j-ellowish pubescent ; 

 genital claspers (fig. 10) 

 distinctive of the species. 



$. Length 7 mm., width 

 3.2 mm. ; usually somewhat 

 paler in color than the 

 male : front of head largely 

 brown but with black spots 

 each side of the median 

 line. Antennae: segment I, 

 black; II, 1.85 mm., slender, gradually enlarged toward apex, j^ellowish, the 

 apical one-fourth black ; the last two segments yellowish, darkened with fus- 

 cous apically. Pronotum : rich brownish to dark brown, calli black, lateral 

 margins of disk slightly sulcata. Scutellum brown, becoming blackish each side 

 of the median line. Venter: dark reddish or reddish brow^i, shining, frequently 

 blackish surrounding the spiracles and at base of ovipositor. 



Holotypc: $ July 2. Ithaca. Xew York CH. H. Knight) ; author's 

 collection, ^//ofyp^ : taken with the type. Paratypes: 205 21$ taken 

 with the types on Bctiila liitea, the large tree standing about forty feet 

 up behind the Cornell University hydraulic laboratory. CONNECTI- 

 CUT,— 5 July 2, New Haven ( \V. E. Britton-). 5 July 4. South Meri- 

 den (H. Johnson). MAINE,— 9 July 16. Wales (C. A. Erost). $ 

 July 24, ? July 30, 5 Aug. 4, Peaks Island (G. A. Moore). 3^1$ 

 August, Mt. Katahdin, alt. 3,000 ft. (H. G. Barber). IMASSACHU- 

 SETTS,— 23 19 July 18, Beach Bluff (H. ^I. Parshley). NEW 

 HAMPSHIRE.— 9. Mount Washington; i. Eranconia (^Irs. A. T. 

 Slosson). NEW JERSEY,— 9 July 4, Hopatcong (H. G. Barber). 

 9 July 6, Newfoundland (Wm. T. Davis). NEW YORK.— 3 June 

 23, 43 29 June 30, U 19 July 2, Ithaca (H. H. Knight), on Acer 

 spicatum. 23 19 June 26, 3 3 59 July 13. Ringwood, near Ithaca; 43 

 59 July 3, McLean Bogs; 23 49 July 4. Eour Mile (H. H. Knight), 

 all on Betiila liitca. 9 June 9. 9 July 16. Staten Island; 3 June 20, 



