THE CANADIAN ENTOMOLOGIST. 



placed sub-dorsally and posteriorly. Above the anal feet, directed back- 

 wards, there are two black chitinous teeth ; in the younger specimens they 

 are more prominent and upturned. The scanty brown hairs arise from 

 slight papillce. 



The larva before transforming prepares a way for final escape which 

 it carefully guards by means of a silken membrane, reinforced by fragments 

 of wood ; it then lines its burrow with silk and spins a firm cocoon about 

 itself. 



The pupa is light brown. The clypeus is armed with a sharp wedge- 

 shaped process, strengthened by ridges at its four angles and also by a 

 median dorsal ridge. The abdominal rings are furnished, as usual, with 

 two transverse rows of teeth, except the anal and pre-anal segments, 

 which have but one row each. The terminal ring is obliquely truncated, 

 bearing several teeth. Length . 6 of an inch. 



The moth is described by Harris in Silliman's Journal, Vol. 36, 310, as 

 follows : 



'•' Blue black ; fore wings opaque ; hind wings transparent, with the 

 border, fringe and transverse line near the middle black ; palpi at tip, 

 collar, a spot on each shoulder, and three bands on the abdomen yellow; 

 antennae short, black ; the four posterior tibiae banded with orange ; tarsi 

 yellow tipped with black ; tail flat with two longitudinal yellow lines. 

 Expands from i to i ]i, inch." 



He says further that " this species seems to come near the European 

 asiliformis, but the male has only two abdominal bands, while asilifortnis 

 male has five." 



I am able to add the differences between the sexes and to mention 

 some characteristic marks not referred to above. The male is consider- 

 ably smaller ; the antennaj are strongly pectinated to the apical portion, 

 which is smooth and enlarged to nearly twice the diameter of the middle 

 part; the processes of the joints are hairy with a long fascicle at the 

 apex ; the minute apical cone also bears a fascicle of hairs. The antennae 

 are blue black and scaled above, below pale bay. The abdomen has 

 four yellow bands. No " longitudinal yellow lines in the tail." Both 

 sexes have a conspicuous white spot bordering the eye in front ; four 

 small yellow spots on the upper part of the thorax ; two below the base 

 of fore wings, also a yellow line at the outer edges of the 

 collar ; the outer edge of the coxte of the first pair of legs, also 

 those of the second and third pairs are of the same color. The fore 



