VOL. lY. 



BROOKLYN, JUNE, 1888. 



NO. 3, 



A Revised Generic Table of the EURYTOMINyE, 

 with Descriptions of New Species. 



By William H. Ashmead. 



(Part I.) 



Piof. Wesiwoocl's group Eurytomidcs, in the famil}^ Chalcididce, has 

 always been an aitractive one to students in the order Hymenoptera, on 

 account of the dissimilarity in the habits of some of the species represent- 

 ing the group ; for, while the major portion of them are true parasites, 

 it is now a thciroughly established fact that a small portion of them are 

 unquestionably Phytophagous, orpscudo gall-makers; and, if we exclude 

 the BlastophagcE, or Fig-caprifiers from the family Chalcididce, they are 

 then the only ones in the whole family out of thousands of speffies that 

 have this habit. 



Up to the present day, the species composing the group, have been 

 placed in but seven genera, viz: — Eiin'/o?na, lUiger, 1807; Decaioma, 

 Spinola, 181 1 ; Isosoma, Walker, 1832; Sysiole, Walker, 1832; Phv- 

 /achvra, Haliday, \'$,']i \ Aiolomorphus, Walker. 1 87 1 : and .Z^6^///v/A/, 

 Cameron, 1884. 



But recendy, in working up my material in the group, the acumula- 

 tion of several years, I have found it necessary to erect niany additional 

 genera and below I give a cai-efully prepared analytic tab!e of all the known 

 genera, with the essential characters of the new KA^<:^ recognized, whicli 

 will be followed by another \^^\yt\■ with descriptions of t'.ie new species. 



The table is as follows : 



