268 PROCEEDINGS OF THE NATIONAL MUSEUM. vol.58. 



Host — Galleria mellondla Linnaeus. 

 Type locality. — Lansing, Michigan. 

 Ttjpe.— Cat. No. 22858, U.S.N.M. 



Described from the above 10 specimens reared by Prof. R. H. 

 Pettit from the host in a honey storage room. 



Tribe CREMASTINI. 



Since my revision of the North American Cremastini ^ was pub- 

 lished I have had opportunity to examine the types of the Cresson 

 and Davis species of Cremastus not tabulated in that paper; also 

 several new species of Cremastus have come to hand. Further study 

 of certain other so-called tribes of the Ophioninae convinces me that 

 the tribe Pristomerini of Ashmead and the genus EipJiosoma Cresson 

 should be referred to this tribe. The relation of Eipliosoma to Cre- 

 mastus was pointed out by Cresson himself in his original description, 

 and he retained it in this position in his Hymenoptera Texana (1872). 

 Roman ^ goes so far as to include it in the Cremastini. Aside from 

 the possession of the femoral tooth these groups differ in no radical 

 way from Cremastus or the other genera heretofore assigned to the 

 Cremastini. The very elongate form of EipJiosoma and the short, 

 stout form of Pristomerus are both found in Cremastus. The struc- 

 ture of head, thorax, and abdomen diffei-s only in minor details from 

 that of Cremastus, while the venation is practically the same except 

 for the more frequent occurrence of the areolet in EipJiosoma. In 

 general EipJiosoma is very like the typical Cremastus with the clypeus 

 less distinctly separated, the propodeum usually less completely 

 areolated, the areolet more frequently present, and the propodeal 

 "neck" shorter; while Pristomerus is so similar to certain species of 

 the subgenus Zaleptopygus that were it not for the toothed femora 

 they would fall very nicely into that group. 



The characters used in my earlier paper to distinguish the Cre- 

 mastini from the Porizonini do not all apply to botli EipJiosoma and 

 Pristomerus, nor, for that matter, to certain new species of Cremastus 

 described below. The abdomen is not always strongly compressed 

 though always distinctly so; and in EipJiosoma and Pristomerus 

 the intercubitus is not always longer than the second abscissa of 

 cubitus, but is always distinct. XipJiosomella Szepligcti is said to 

 have the intercubitus very short or lacking, but it is evidently closely 

 related to EipJiosoma. 



The following key to genera is that of my earlier paper with EipJio- 

 soma, Pristomerus, and a new genus added. 



» Proc. U. S. Nat. Mus.. vol. 53, 1917, pp. 503-551. 

 * Arkiv. for zoologie, vol. 9, No. 9, 1915, p. 6. 



