Deraeocoris (Heteroptera, Miridae) 131 



Roseville; 29 Hamilton County; $ July 9. Whiteface Mt. (Wm. T. 

 Davis). ? June 28, 5 (5 6? July 2, $ July 8, White Plains (J. R. Tor- 

 re-Bueno). S June 20, Ft. Montgomery (F. M. Schott). PENN- 

 SYLVANIA,— c5 . Delaware Watergap (Mrs. A. T. Slosson). 



Breeds chiefly on yellow birch, Bctiiia liifea. the types and a 

 good series being taken from one large tree, mostly from among clus- 

 ters of aphid-deformed leaves. Nymphs as well as adults were taken 

 on mountain maple, Acer s pica tit in. on the south shore of Reebe 

 Lake, but collecting on the same plant at other localities failed to pro- 

 duce additional records. Caged specimens fed on sap of the host 

 plant, altho observations made in the field point toward predaceous 

 habits also. 



Description of the fifth iiyiiiphal stage: 9. Length 5.1 mm., greatest width 

 2.45 mm., more or le.s.s covered with a white, wax-like, flocculent material. 

 Head: width 1.14 mm., vertex .65 mm., length .71 mm.; more flattened and 

 eyes smaller than in the adnlt, verte.x, front, and tylus beset with large stiflf 

 black bristles ; pale testaceous and tinged with pink, eyes darkened. Rostrum, 

 length 1.98 mm., reaching to middle of the hind coxae, pale, blackish apically. 



Antennae : segment I, length .4 mm.; II, 1.31 mm., more slender than seg- 

 ment I, slightly thickened toward apex, rather sparsely beset with black bristles 

 which in length are equal to twice the thickness of segment; III, .63 mm.; 

 IV, .57 mm. ; uniformly dusky or fuscous, the last two segments sparsely beset 

 with hairs. 



Pronotuni: length .83 mm., width at base 1.57 mm.; anterior angles 1.03 

 mm., nearly in contact with eyes, front margin sulcate ; basal margin nearly 

 straight, rounded at basal angles, lateral margins distinct, nearly straight ; 

 disk slightly convex, sparsely beset with coarse black bristles, more prominent 

 at anterior angles ; propleura nearly vertical, coxal cleft prominent, xyphus 

 convex, margins ecarinate ; testaceous or dusky, darker on disk, the median 

 line paler and continued upon the mesonotum. Mesonotum and wing-pads 

 dusky, the latter darker toward apices, both pairs reaching to base of third 

 tergite, sparsely beset with black bristles, larger at the lateral margins. 



Legs : pale to reddish brown ; femora reddish brown to blackish on the 

 apical half, dusky or paler toward the base, dorsal surface beset with several 

 stiff bristles ; tibiae reddish brown to blackish, darkest specimens with an indis- 

 tinct pale annulus on apical half, anterior surface with two rows or series of 

 stifif bristles ; tarsi two-segmented, blackish, claws blackish, arolia similar to 

 those of the adult. 



Abdomen : distinctly pink, paler at the margins, ten segments visible from 

 the dorsal aspect, sparsely beset with bristles ranged in rows; third tergite 

 with a dark median spot which also invades slightly the fourth tergite, darkest 

 color inclosing two pore-like spots situated at the suture between the tergites ; 

 a row of dark spots situated each side on the submarginal area, a spot at 

 the anterior margin of each tergite and becoming progressively larger distally ; 

 eight sternites visible, a spiracle situated each side in the sublateral area of 

 the first seven ; last two sternites infuscated along the median line, a longi- 

 tudinal suture visible which is more evident on the last segment and appears 



