JAN 25 1892 



1V^ 



Article XI. — Descriptions of new Ciinipidce in the Collection of 

 the Illinois State Laboratory of Natural History*. By C. 

 P, Gillette, of the Iowa Experiment Station. 



FAMILY CYNIPID^. 



SUBFAMILY CYNIPIN^. 

 Genus Diastrophus Hartig. 



D. scutellaris n. sp. 



Gall-fly. — Female. — Head, thorax, and scutellum black; 

 mandibles, antennee, legs, and abdomen yellow-rufous. Length, 

 3 mm. 



Head black, shining, face coarsely striate and sparsely 

 haired, frontal carina rather prominent and striate, a deep 

 groove extending up on the front, from between the antennae, 

 containing the middle ocellus at its upper end, the ridges or 

 carina on either side of the groove finely aciculate, the outer 

 ocelli borne on the summit of the vertex, the latter shining 

 and having a few punctures in the vicinity of the ocelli; occi- 

 put aciculate. Thorax: collar covered with a growth of rather 

 long hair, mesothorax black, polished, and covered with a net- 

 work of microscopic depressed lines, humeri coarsely aciculate 



* The following descriptions of new Cynipidipe were made during 

 a recent vacation visit at the Illinois State Laboratory of Natural 

 History, and it is through the kindness of the Director, Dr. S. A. 

 Forbes, and Hon. R. P. Speer, Director of the Iowa Experiment Sta- 

 tion, that I am permitted to publish them in this Bulletin. 



I wish here to express my most hearty thanks to Dr. Forbes for 

 the free use allowed me of the library, collection, microscopes and 

 other laboratory equipments during my visit, and also for the excel- 

 lent cuts made under his direction to illustrate the present paper. 

 Mr. C. A. Hart and Mr. John Marten 1 have to thank for many favors 

 received. 



Types of all the species here described may be found in the col- 

 lection of the Laboratory. 



