— 179— 



Partial Preparatory Stages of Dryopteryx rosea, W//:. 

 By Harrison G. Dyar. 



Rhinebeck, N. Y. 



£^gg. — Elliptical, flattened above and below, 8 mnn. long and 4 

 broad, finely punctured. Color white. Laid singly, or in twos or threes 

 on either surface of the leaf. When more than one is laid at once they 

 are in a line in the direction of their longest diameters. 



Neivly hatched larva. — Body somewhat wrinkled, swelled at joint 2 

 which has tw-o short conical processes. A single process on top of joint 

 4. Body terminates in a single prolongation. Color brown, blackish 

 laterally. Head rounded and black. Head and body thinly covered 

 with very short and whitish hairs. The larva eats the upper half of the 

 leaf at the edge, resting on this portion which becomes withered and 

 brown, much resembling the color of the insect at this stage. 



After 1st moult — Transversely wrinkled, four wrinkles to each joint, 

 and roughened with numerous small yello\vi>h points. Color \fcilL)\\ish 

 dorsally, l)niwnish laterally; two conical processes on joint 2, one on 

 joint 4. Head notched on top, rougheneil. Colur brown. 



After 2nd VI Old t. — Similar tn the preceeding. The larva now feeds 

 on the entire leaf, but when not feeding rests on the witheied portion 



After jrd moult. — Color more even uniform brown but lighter dors- 

 ally, the lateral color extending upward on joint 8. 'I'he yellowish points 

 are now very numerous. 



After 4th moult. — Similar, but nearly uniform brown, the head a 

 little lighter and a narrow blackish dorsal line. Head surmounted by 

 two conical processes, the process on joint 4 rather shorter in f)roportion 

 than before, but the prolongation to the last segment one-third as long 

 as the body. Body wrinkled as in the previous stages and rough. 



After this moult the larvae become lethargic and hybernate, resting 

 on the stem of the plant. They spin a very slight web on the bark to 

 which they cling. Their color closely resembles that of the bark. 



Mr. (jiote has given a description of the mature larva in Canadian 

 Pmtomologist, Vol. XIX, p. 50. There are probably two broods of the 

 insect in a season as the moths occur in June and August, but I have not 

 found any larvaj of the first brood. 



Food plants : Viburnum un folium and ]'. lentago. 



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