No. 1774. THORAX OP HYMENOPTERA—SNODGRASS. 65 



III. ICHNEUMONOIDEA— Continued. 



CapitoniiDuE. (This family consists of at most four 

 genera, of which Capitonius is the best known). 

 Capitonius ashmeadii Dalla Torre. — fig. 21. 

 EvANiiDiE. (This family includes three subfamilies — the 

 Evaniinae, Aulacinae, and Fceninae.) 



AULACIN^. 



Odontaulacus editus (Cresson). — fig, 22. a 

 ichneumonid^. 

 Ophionin^. 



Erymotylus macrurus (Linnaeus). — figs. 23, 33. 

 Tryphonin^. 



Metopius pollinctorius (Say). — fig. 24. 



PiMPLINiE. 



Megarhyssa lunator (Fabricius). — fig. 25. 

 Cryptin^. 



Cryptus extrematus Cresson. — fig. 26. 



ICHNEUMONIN^ . 



Trogus lutorius (Fabricius). — figs. 27, 29, 30, 32. 

 Allomya dehellator (Fabricius). — fig. 28, 31. 



IV. CHALCIDOIDEA. (According to Ashmead there are fourteen 



families in this group. The following eight are 

 selected to show the range in variation of 

 thoracic structure.) 



TORYMID^. 



TORYMIN^. 



Syntomaspis racemarisp, (Ashmead). — fig. 34. 



ChALCIDIDuE. 



Leucospidin^. 



Leucospis affinis Say. — figs. 35-39. 



EURYTOMID.^. 



EURYTOMIN^. 



Eurytoma diastrophi holtenii Riley. — fig. 46. 



MiSCOG ASTERID.E . 



Tridymin^, 



Hemadas nuhilipennis (Ashmead). 

 Encyrtid^. 



EuPELMINuE. 



Ceramhycohius cushmani Crawford. — figs. 40, 41. 

 Encyrtin^e. 



Microterys, species. — figs. 42, 43. 

 Pteromalid^. 



PtEROMALINuE. 



Gatolaccus incertus Ashmead. — fig. 44. 



ELASMIDiE. 



Elasmus atratus Howard. 

 Proc.N.M.vol.39— 10 5 



