244 MKMOIKS OF THE CARNEGIE MUSEUM 



15. Front femora much swollen, the hind femora finely serrate beneath ; antennie with 2 ring-joints. 



Flesiostigmodes Ashmead, g. nov. (type P. brasilicnsis Ashm.). 

 Front fenioia normal, the hind femora finely serrate beneath and often with a tooth ; antennae with 1 

 ring-joint. 



Stigraal vein distinct, its knob always petioled Cryptopristus Forstei-. 



Stigraal vein very short, its knob sessile Hemitorymus Ashmead. 



16. Antennae in.serted close together. 



Antennae 2-jointed, the second clavate (dimorphic form) — Plesiostigma Jlay r, Nannocerus Mayr. 



Antennae 4- to 7-jointed ; thorax not depres.sed ; hind femora with 2 teeth beneath towards apex ; 



hind tibiae with spines only at base of tarsi (dimorphic form) Physothorax Mayr. 



Subfamily IV. Podagriomn.i:. 



This group in having the hind femora greatly swollen and dentate beneath, with 

 the hind tibia) curved, resembles the Chalcididse, but otherwise, in the structure of 

 head, side pieces of the thorax, coxa?, and in venation, it is a genuine Torymid, and I 

 have here removed it from the Cli<tlci<ll<hi\ where late authorities have placed it, to a 

 place in this family. 



The genus Pudagriun is parasitic in the egg-cases of the orthopterous family 

 Mantidie. 



TABLE OF GENERA. 

 Stigmal vein not so .short, the knob petiolate ; tarsal joints 2-5 very short, transverse, the first joint long ; 



hind femora armed with 4 teeth Pachytomus Westwood (type P. kliigianvs Westw.). 



Stigmal vein very short, the knob subsessile ; tarsal joints 2-5 not short ; hind femora armed with from 6 



to 8 teeth Podagrion Spinola (type P. sjjlendens Spinola). 



Subfamily V. Mega.stigmin.e. 

 1875. Mcgastigmides, Subtribus, Thomson, Skand. Hym., IV., p. 59. 

 1899. Megastigminfe, Subfamily IV., Ashmead, Proc. Ent. Soc. Washington, IV., p. 

 24G. 



The species falling in this subfamily are easily recognized Ijy the large circular 

 or rounded knob of the stigmal vein. 



Species of the genus Megastigmus are bred commonly from hymenopterous and 

 dipterous gall-makers [Ci/nijndie and Cecidomyiidir) and also from the seed capsules 

 of various trees and plants. The group is, therefore, phytophagous as well as para- 

 sitic. Megastigmus spernutlotr phm Wachtl was bred from the seed of the Douglas 

 spruce, Pseudotsuga doughtsii. It is identical with 3L j)in((s Parfitt, also bred from 

 the seed of a pine and de.scribed thirty-six years earlier. 



TABLE OF GENERA. 



1. Head and thorax smooth or transversely wrinkled or aciculate ; mandibles 3-dentate 2 



Head and thorax neither smooth nor transversely wrinkled or aciculate, but sparsely or very finely 

 punctate ; mandibles 4-dentate. 



