NORTH AMERICAN HYMENOPTERA. 39 



Synopsis of the HORlfllllV^ of North America. 



BY WILLIAM H. ASHMEAD. 



The Braconids belonging to this group are few in number, and 

 very closely allied to the Doryctinte, Rhyssalinse and Rhogadin?e, 

 but are readily separated from these groups by the subdiscoidal ner- 

 vure being interstitial with the anal nervure. Horviiopterus Giraud 

 comes very close to Deyidrosoter Wesmael ; Chremylus, with wings 

 removed, resembles Pambolus Haliday, while Hormim Nees conies 

 closest to Rhyssalus Haliday. 



Table of Genera. 



Median cell much shorter than the submedian cell along the exteruo-medial 

 nervure. 



Anteunfe at the most 12-joiuted Chreiuylns Haliday. 



Median and submedian cells of an equal length. 

 Antennae multiarticulate from 17- to 36-jointed. 



Eecurreut nervure not interstitial with the fii-st transverse cubital, but join- 

 ing an angle in the second submarginal cell Horitiiiis Nees. 



Recurrent nervure interstitial with tlie first transverse cubital. 



Horiiiiopterus Giraud. 



CHREinYIiUS Haliday. 



In Europe but a single species is known, C. rubiginosus Boh., re- 

 corded by Marshall as having been reared from Bruchus rufimanui^ 

 Boh., B. seminarius Linn, and B. granarius Sch. ; also from Tinea 

 pelUonella Linn. In our fauna I have recognized two species dis- 

 tinguished as follows : 



FEMALES. 

 Head, mesoscutum, scutellum and basal and apical abdominal segments black. 



First branch of cubitus rather strongly curved inwardly. 



C. terniiuaiis sp. n. 

 Head black, rest of body rufo-piceous. 



First branch of cubitus almost straight C. iiigriceps sp. u. 



MALES. 

 Head and thorax black; abdomen rufous C Iligriceps sp. u. 



1. Ciireniyliis teriniiialis sp. n. 



9. — Length 18 mm. Head, mesoscutum and basal and apical abdominal seg- 

 ment black, rest of body dull ferruginous; antennae, mandibles, tegulae and legs, 



TRANS. AM. ENT. SOC. XX. APRIL, 1893. 



