58 [May 



GrRAPTA PROGNE, Fab. 



Larva, reddish grey ; spines white, with branches, some of which 

 are bhick tipped ; tubercles from which the spines proceed, Hght red ; 

 on each .segment two or three bhick bands posteriorly, and four short 

 black dorsal lines, extending obliquely from its anterior edge, across 

 one-third of its extent — -the two inner ones directed toward the cross- 

 ing of the vascular line by the incisure — and the two outer ones toward 

 a point on the following segment. Prologs, black exteriorly. Head 

 small, strongly spiued. Length 1.25 inches. 



While feeding, the larva detaches its terminal legs from the leaf, 

 and curves upward its last two segments. T have taken it on the wild 

 Grooseberry (^Rihes rotund ifuliiim) and on the Currant (^Rlbcs rubrum. ) 

 In chrysalis, June 13th — 20th; emerges from chrysalis after twelve or 

 thirteen days. 



Chrysalis, .85 in. long; head-case prolonged in two parallel obliquely 

 truncated horns, foi'ming a full U — their tips maculated with brown ; 

 thoracic projection, not prominent; dorsum, slightly depressed, and its 

 spines almost obsolete; humeral projections as in comma; wing-ca.ses. 

 with a blunt projection near their posterior margin, and deeply exca- 

 vated centrally; terminal spine, long, rounded, moderately curved. 



The hutterjli/ probably hybernates. I have taken worn and faded 

 ones, early in May, which had doubtless survived the winter. A few 

 may be disclosed from chrysalis in the spring. Dr. Fitch gives July 

 as the time of its appearance, and limits it to a single brood ; he records 

 as worthy of note, that Dr. Harris had obtained it as late as the 18th 

 of i^ugust. I have captured it fresh and just from chrysalis, the 7th 

 of September — clearly establishing the fact which would naturally be 

 expected from its close relationship to comma, of two annual broods. 

 Toward the last of September and early in October, it may frequently 

 be seen, regaling itself upon the juices of fallen pears and other fruit, 

 in company with interrogationis. 



Grapta j. album, Grodt. 



Larva, two inches long, light green ; head with black markings on 

 the sides — thickly set with setae and with short spines, of which the 

 lateral ones are each tipped with a long seta — and armed with two 

 shining black, thick spines, verticillated near the tip ; the dorsal and 



