34 



NATURAL HISTORY BULLETIN. 



The oval scutiform pieces on the sides are minutely hairv at 

 the broad end. 



Spiracles in nine pairs, the first ( and largest ) placed in the 

 prothorax as described, the remainder in segments i to 8 of 

 the abdomen. 



Legs moderate, the femora and tibia; about equal in length, 

 the former straight, with a few small bristles, the latter 

 curved, furnished with lonij hairs and a well-marked lon^itud- 

 inal ridge. Claws single, long and slender. 



This larva resembles in some respects that of Dinapale 

 zvn'ghlii as figured by Dr. Horn in the Trans. Am. Ent. Soc. 

 XIII. p. I. pi. I. The antenna; are verv much alike in the 

 species as are also the maxilla; so far as essential structure is 

 concerned. The cleft claw of the Dinapatc larva has, how- 

 ever, no representation in our species. 



The material studied was sent me b\- Dr. F. E. Blaisdell, 

 from Calaveras Co.. California. The pupa, which accompan- 

 ied the larva, is yellowish white. 8 mm in length and broader 

 across the abdomen. The posterior legs are covered bv the 

 wing-pads, except the extreme tips. 



SPERMOPHACiUS ROBINL-E Scil. PlATE I. Fl<;. 3. 



Color of larva white, head chestnut. 



Form robust, convex, in life broader across the metathor- 

 acic region, the abdomen somewhat recurved. A dead spec- 

 imen is sack-like in form. Length curved 4 mm. extended. 

 7 mm. 



Head verv small, anterior margin emarginate. clypeus dis- 

 tinct, transverse, labrum sinuate and ciliate anteriorly; these 

 parts are exceedingly minute and the description is drawn from 

 a preparation in Canada balsam — the appearance is precisely 

 that shown in the figure and I have little doubt that they are 

 correctlv homologized as above. 



Antenna; contained in cavities, three-jointed, the basal joint 

 larger, short and thick, the second smaller, third exceedingly 

 minute, visible onlv under high powers such as are obtained 



