little wider than head, the neck being somewhat constricted; & 
60 The American Naturalist. 
ENTOMOLOGY." 
The Pupa of Argyramceba cedipus Fab.—The descripti 
given below is drawn from a pupal skin sent to me with the fly by 
Prof. C. P. Gillette, who bred the latter from a nest of Odynerus 
at Fort Collins, Colo. In a paper which will be published in Psyche, 
I have described the pupa of Toxophora virgata O. S., and also made 
some mention of the pupæ of Bombyliide which have so far been 
described. The pupa of the present species differs quite markedly 
detail from that of the Toxophora above mentioned. 
Pupa of Argyrameba edipus: General color of empty pupal 
very pale straw colored; the cephalic horns black, reddish-brown 
basally, anal horns black, slightly reddish-brown at base; dorsal rows 
of ridges reddish-brown, the terminal spinous processes blackish; pro 
thoracic spiracles reddish-brown, other spiracles but little darker than 
rest of integument, slightly brownish. Head conforming to shape 
head of adult fiy, more or less sub-spherical in form. Eight ceph 
horns or teeth arranged in four pairs, the three anterior pairs joi $ 
in a common base, the posterior pair removed from others; anterior 
pair longest, their rufous brown joined hasal portion distinctly shorter 
than their black free terminal portion, moderately slender, nearly : 
straight, directed forward, gradually tapering to tips; second and third 
pairs more closely approximated one pair to the other than are ! 
first and second pairs, but the two horns of each pair widely remo 
from each other, both pairs directed nearly forward but at a slightly 
more downward angle than first pair; third pair much shorter than 
‘second, more curved or claw-like ; posterior pair closely approxi mash 
at base, nearly as large as third pair, but straight and directed infer- 
iorly, situated nearly in middle of ventral surface of head segment; : 
pair of quite widely separated divergent bristles on outer dorsal sur- 
face of anterior cephalic horns; a more approximated nearly para 
pair just posterior to these but arising from integument of head- 
anterior dorsal edge, being situated just behind the suture at base 
cephalic horns; a divergent pair situated just anterior to base of tas 
posterior of fourth pair of cephalic horns; a small bristle on each side 
at hind margin of ventral surface of cephalic segment. Thorax 
. 
‘This department is edited by Clarence M. Weed, Hanover, N. H. 
