OF WASHINGTON. 33 



DESCRIPTION OF THE LARVA OF TRIPROCRIS SMITH- 

 SONIANUS CLEMENS. 



By HARRISON G DYAR. 



Found at Salida and Otis, Colorado, July 25th. 

 "Pyromorphid shaped, rounded, flattened elliptical. Head rounded, 

 bilobed, elongate, the clypeus touching the large membranous vertical 

 triangle, shining brown, sutures darker; entirely concealed in the hood 

 of joint 2. Hood hairy. On joints 3 and 4, five warts; on 5 to 12, four 

 warts; on 13 a large diffuse wart. Subdorsal warts V-shaped, the lateral 

 oblique, lower subventral small, the rest large, low. pale whitish, many 

 haired with short brownish black-tipped bristles and a few longer pale 

 hairs; only one or two such from the upper two warts. Diffuse black 

 lines dorsal, lateral, stigmatal and subventral, all the rest of the space be 

 tween the warts shaded in pale brick red, except along warts iv-f-v where 

 whitish prevails. Feet on joints 7 to 10 and 13, normal, short, with a 

 few hairs outwardly. Spiracles round, pale, conical centrally. At ma 

 turity the dorsal black band was widened intersegmentally, with paired 

 white, glandular spots in the position of depressed spaces (i) of the Coch- 

 lidiidae, white-edged, the edge passing through the center of warts 

 i+ii ; below this a pale salmon-colored band ; lateral black line narrow, 

 waved, white edged; a narrow salmon line; stigmatal black band dotted, 

 broadly white below; subventral black line dotted, without distinct white 

 edging; venter pale, thorax ventrally and feet orange; traces of a broken 

 ventral black line. 



Cocoon in the ground or leaves, white, of flocculent silk, 

 opaque, flattened, as usual in the group. 



Food plant: Allionia nyctaginea, kindly determined bv Mr. 

 C. L. Pollard. 



Mr. Schwarz showed twigs covered with some unknown 

 kind of insect eggs, collected by him at Williams, Arizona, last 

 July. Mr. Pergande, he said, had found a single larva among 

 them which was pretty certainly that of a Dipteron (perhaps a 

 species of Asilus according to Mr. Pergande). 



Mr. Morris stated that during the past summer he had ob 

 served at two places on Stein's Mountains, Southeastern Oregon, 

 swarms of a Locustid (Anabrus purpurascens Uliler). They 

 were defoliating everything in their path, even the kt salt-bushes." 

 The larger swarm covered an area of about one hundred square 

 yards. 



A paper submitted for publication by Prof. A. D, Hopkins 

 was then read by title. It is as follows ; 



