HYMENOPTERA. 109 
Preroma.us, Let.—Cleptes, Fab. 
Where the thorax is short and not narrowed anteriorly(1). 
Cironymus, Lat. 
Where it is elongated and narrowed anteriorly. The abdomen is 
also proportionally longer, and the antennz are inserted more infe- 
riorly(2). 
There the nervure of the superior wings, situated near the margin, 
is sometimes straight, and unites at the callous point. The interme- 
diate legs are the longest, and the inner side of their tibiz is fur- 
nished with a stout spine. 
The scutellum projects. 
Evurreitmus, Dalm. 
Where the infra-costal nervure, as in the preceding Insects, is 
curved, and unites at the exterior margin, before the callous point. 
The first joint of the intermediate tarsi is large, and ciliated be- 
neath(S). 
Encyrrus, Lat. 
Where that nervure is straight and unites at the callous point, or 
rather at the branch which commences the cubital cell. The club 
of the antennz is compressed and truncated at the end(4). 
SPALANGIA, Lat. 
Distinguished from the preceding by the generally longer antennz, 
which are inserted close to the anterior margin of the head(5). 
(1) Lat., Tbid| 31: 
(2) Lat., Ibid., 29. 
(3) Dalm., Monog. of the Pteromalini. 
(4) Lat., Gener. Crust. et Insect., IV, 31. 
(5) Lat., Ibid., 29. 
