210 EDWARD NORTON. 



mandibles, pale green. Joints of the body above with rows of small, 

 shining black tubercles placed crossways, in the mature specimens 

 •having no hairs, except in the larger tubercles on the sides. First 

 joint behind the head with a single row of dorsal tubercles; joints two 

 and three each with a double row; joints 4 — 12 with a treble row; 

 the anal plate black, polished, and prolonged at each posterior angle in 

 a slender, acute thorn, and hairy, beside the triple row of tubercles be- 

 fore it, a group of six or eight on each side and directly before it. A 

 longitudinal row of larger lateral black tubercles on joints 2 — 12, one 

 on each joint, beneath which is a geminate black tubercle above each 

 proleg, all of these bearing many hairs. Legs black, the sutures pale 

 green. Prolegs fourteen, pale green, all but the two anal ones with a 

 few minute black dots toward their tip in front. Joints 4 — 11 with- 

 out prolegs." 



Prof. Winchell describes the larvaj and its habits as follows : 

 The larvae feed on the leaf of the red currant. They are twenty- 

 footed, (six pectoral, twelve abdominal and two caudal). First seen 

 by him May 23d. " The full-grown larva is three-fourths of an inch 

 in length, color pale green ; head, tail and feet black, with numerous 

 black spots regularly arranged around the body, from the summit of 

 each of which proceeds one, two or more short stift' hairs." They be- 

 gin upon the leaves near the ground, eating all the tissue of the leaf, 

 and working upward destroy all the leaves. They passed into the 

 ground and all disappeared abimt the 23d of June. On the IGth of 

 June a swarm was seen under the currant bushes, mostly males, gene- 

 rally sluggish, but at intervals excited, especially when a female ap- 

 peared. The female proceeded at once to deposit her eggs, which were 

 cylindrical, whitish and transparent, in regular rows along the under- 

 side of the nerves of the leaves, at the rate of about one in 45 seconds. 

 The embryo escaped from the egg in fonr dai/s. When it first escaped 

 it was one-tenth of an inch long. It became one-third longer in twen- 

 ty-four hours. It attained its full growth by June 25th. It then 

 moulted and descended into the ground. 



Nummary. — "First Iji'ood May 17th. First liirvse May 21st. Moulling and l)ur- 

 rowing June od. 



Second brood June 16th. Second larviB June 25th. Moulting and 

 burrowing June 28th. 



Incubation of ovum three or four days; feeding, inouKiiig and bur- 

 rowing eight days. Time in gr(nuid of first brood 13 days, life 

 of fly 9 days." 



Prof AVinchcll thinks that the larva chaiiired its skin but once. 



