160 Journal New York Entomological Society. [Vol. vi. 



green. Head rounded, green with black ocellus and brown mandibles ; 

 width .8 mm. The horns are detachable as at maturity. Length, 4.5 

 to 7 mm. 



Stage V. — Shape as in the mature larva, all the horns equal except 

 joints 3 and 4 which are beginning to be a little shorter, that of 3 

 slightly recurved. Dorsal groove distinct, narrow ; basal piece of horns 

 distinct, cordate at base. Horns regularly tapering, rounded at tip, 

 densely clothed with long, fine, white fringe- hairs. There are also some 

 smooth, short, dark-tipped hairs and short, densely feathered, stellate 

 ones especially toward the bases of the horns. Setae i and ii long, 

 smooth, black. Skin as at maturity. Color soft, clear green, more 

 whitish along the dorsal groove. Nearly all the specimens (35) had lost 

 the red spots at this stage, only one or two retaining them. Length, 7 

 to 10.5 mm. 



Stage VI. — Mature larva. Length, 10.5 to 16.7 mm. The short 

 smooth hairs on the horns represent the long smooth ones of the earlier 

 stages; the short, very feathery hairs are those of the long feathery 

 ones which lie on the dorsal aspect of the horns, made short. The 

 larva here recorded probably omitted one of the normal stages. Prob- 

 ably the penultimate as in Packardia geminata (Journ. N. Y. Ent. 

 Soc. VI, 3). 



It was kept very warm and was protected from the chill night air that 

 it would have had on its native river. Consequently it grew very rapidly, 

 probably more so than in nature. 



Another larva reached 13.5 mm. before last molt which was doubtless 

 this missing stage. It was like the final stage, but the coloration entirely 

 green. 



Food-plants. Add Marl berry (Ardisia picker ingid), cocoa plum 

 ( Chrysobalanus icacod) and another plant not determined. I am in- 

 debted to Mr. F. Kinzel for the names and to Mrs. Slosson for sending 

 leaves to feed the larvae. 



ON THE DIPTEROUS FAMILY SCATOPHAGID^E. 



By D. W. Coquillett, Washington, D. C. 



This family is known in Europe as Scatomyzidae, but since the genus 

 Scatomyza is an admitted synonym of Scatophaga, it would appear de- 

 sirable to change the name of the family to Scatophagidae. In the 



