48 



RESULTS FROM GIPSY MOTH PARASITE LABORATORY. 



At first the pupa is white or yellowish white, but the eyes soon become 

 pigmented with reddish, then the tliorax becomes black, later chang- 

 ing to a metallic green. In about two days the head and abdomen 

 assume the same metallic hue as the thorax, with the sculpture of 

 the adult insect showing through, and soon after this the pui)al skin 

 is shed and the adult insect issues. 



FOOD HABITS OF THE ADULT. 



No observations upon the food habits of the adult Perilampus 

 have been made in connection ^vith this work, excepting that in con- 

 finement they will consume, in common with many other chalcidoid 

 parasites, comparatively large quantities of sweetened water upon 

 banana peelings. During June, 1905, the author found specimens 

 of this genus in abundance upon the leaves of Ambrosia, Helianthus, 



Fig. 2S.— Perilampus hyalinus: Fresh 

 pupa. Greatly enlarged. (Origi- 

 nal.) 



Fig. '^.—Perilampus hyalinus: Pupa just previous to 

 eclosion. Greatly enlarged. (Original.) 



and other vegetation at West Point, Nebr., where they were apparently 

 feeding upon the honeydew secreted by aphides. 



Dr. S. Graenicher, of the Public Museum of Milwaukee, has in the 

 course of his extensive studies upon the pollination of Wisconsin 

 flowers * recorded two species of Pcrilamjms, hyalinus Say and cya- 

 neus BruUe, as visitors of the following Com])osit0e : Eupatorium per- 

 foliatuw., Solidago juncea, S. canadensis, Achillea millefolium, Tana- 

 cetum vulgare, and Erigeron canadensis. In considering the insect 

 visitors to the last named flower he has the following to say: 



It is noteworthy that the chalcid-flies Perilampus cijaneus and P. hyalinus yeem 

 to have a certain preference for these flowers. Tliey were regular attendants, day 

 after day, at Cedar Lake, and were also present at Milwaukee. 



Dr. Graenicher in a recent letter kindly informs me that he has 

 also taken P. cyaneus at flowers of Angelica atropurpurea, Pastinaca 

 saliva, and Sium cicatsefolium. 



1 Bulletin of the Wisconsin Natural History Society, vol. 7, Nos. 1 and 2, pp. 19-77, April, 1909. 



