40 PROCEEDINGS OF THE NATIONAL MUSEUM. vol.46. 



constricted at articulation with mesotliorax, converging beliind to 

 articulation with abdomen. Metanotum longitudinally striate. 

 Wmgs of medium size, transparent, a browTiish tinge at extreme base, 

 constricted in the middle. Fore wing wdthout double fringe on hind 

 margin subapicall^^ Near base of anterior wing, where fore longi- 

 tudinal vein should be stands tliree light-brown spines, the first two 

 being stout and blunt, the third or distal one longer, more slender, 

 and sharp pomted. Fringe of both wings rather heavy, stout, 

 brown, and straight. Legs concolorous with body, the femora a 

 little darker than the tibias and tarsi, of medium length, fore and hind 

 femora slightly thickened, fore coxae projecting strongly and bearing 

 a few very small spines. Fore tarsi with a tuiy tooth within. Legs 

 clothed with numerous short spines, a slender spine on each fore 

 tibia above near the tip alone conspicuous. 



Abdomen long and slender, tapering gradually from the second 

 segment, the eighth and ninth converging more sharply to the 

 tube. Sides of tube nearly straight. Terminal hairs at tip of tube, 

 slender and pale. Spines at sides of abdomen, slender, pale and not 

 very prominent. 



Described from five females; no males found. 



Locality, Laurel Canon, California. 



Food plant unkno\vn. 



H. M. Russell, collector. 



I take pleasure in naming this species after Mr. H. M. Russell in 

 recognition of his economic work upon certain species of the order. 



Type.— Csit. No. 15738 U.S.N.M. 



ZYGOTHRIPS FEMORALIS, new species. 



Figs. 76-79. 



Female. — Normal length about LI mm. (the second, third, and 

 fourth body segments are distended and the specimen as mounted 

 measures L35 mm.). Width of prothorax 0.2 mm., width of meso- 

 thorax 0.27. General color of head and thorax dark brown, abdomen 

 lighter brown on first three segments. Considerable red and orange 

 hypodermal pigmentation in thorax and abdomen. 



Head about one-ninth longer than broad, diverging very slightly 

 behind the eyes, sides straight, broadest behind ; almost straight across 

 the front except for a slight projection between the antennae; back of 

 head transversely striate; post-ocular bristles long, slender, and 

 blunt; cheeks very faintly roughened. Eyes of medium size occupy- 

 ing a little more than four-sevenths the \vidth of the head through 

 them, finely facetted, not pilose, very dark red by transmitted light, 

 light yellowish by reflected light. Ocelli large, situated well forward, 

 the posterior ones in front of center of eyes, anterior one stands upon 

 a prominence of the front; reddish yellow with purplish inner mar- 

 gins. Mouth cone short and blunt reaching a little more than half- 

 way across prosternum, labrum sharply pointed, tipped with black, 



