AMERICAN HYMENOPTERA. 211 



These insects appear in great numbers, and for several years have 

 ahnost destroyed the crop of currants in parts of New York and Michi- 

 gan. 



31. Nematus lateralis, n. sp. 



Black ; orbits, face below antennae, pleura, body beneath, (except breast,) and 

 legs, pale. Length 0.38. Br. wings 0.76 inch. 



$ . Antennae half the length of body, joints cylindrical, 3d and 4th 

 equal, slightly enlarged at tips ; suture at sides of ocelli deep, lower 

 ocellus in a shallow circular space which ha.s a distinct ridge around 

 its upper half; nasus produced, distinctly emarginate in middle and at 

 sides; tongue and palpi dark, last joint of maxillary palpi shorter than 

 the preceding ; the whole orbits as far as sutures, two spots behind 

 ocelli, a spot above antenna;, space around and fiice below, reddish- 

 white; sutures of metathorax and a bent line between upper wings 

 crossing upper half of scutel, rufous ; tegulae, anterior angle, pleura 

 and body beneath, except a black spot on breast, reddish-white; legs 

 the same color; tarsi fuscous, a slender black line on the upper and 

 lower side of femora and less distinctly on the posterior tibiae ; anterior 

 inner tibial spur bifid, inner claw tooth large and near the tip ; wings 

 hyaline, nervures black, stigma pale, with little or no emargination 

 above; second recurrent nervure received at a distance from the inter- 

 section of second and third cells. 



Var. Abdomen almost entirely pale. 



Three 9 . Brunswick, 3Ie., (A. S. Packard.) Albany, N. T., (Dr. 

 Peck). 



32. N. desmodioides. 



NemaiMs desmodioides, Walsh, Proc. Ent. Soc. Phil., vi, 1866, 257, 9 % . 



Length 9,0.15— .19, -J, , 0.11— .13. Br. wing 9,0.17 

 , —0.20, %, 0.17. 



" 9 . Shining greenish-white. A quadrate spot enclosing ocelli 

 nearly reaching to antennae, never touching the eyes, and tips of man- 

 dibles, black. Clypeus emarginate in an arc of about 90~^. Labrum 

 rounded at tip. Occiput with a more or less dark black cloud on its 

 upper disk confluent with ocellar spot, and generally concealing the 

 sutural black lines. Antennae one-half as long as body, joints 3 — 5 

 subequal, 9 sometimes as long as 8, the scape black, flagelkim brown- 

 black. Thorax black, with the tegulae, anterior angle, except a lateral 

 black spot, a pair of transverse spots on the scutel and sometimes con- 

 tiguous, and a large, obscurely defined, triangular spot on the pleura, 

 greenish-white. Rarely (2 9 out of 8 9 J the mesonotum is dull rufous, 

 with a broad black vitta reaching from the collare to the scutel, and 



