CONTRIBUTIONS TO OUR KNOWLEDGE OF BEFS \XD 

 ICIINEmiOX-FLIES, INCLUDING THE DESCRIPTIONS OF 

 TWENTY-ONE NEW GENERA AND FIFTY-SEVEN^ NEW 

 SPECIES OF ICHNEmiON-FLIES * ' 



By H. L. ViERECK, 

 Of the Bureau of Entomology , United States Department of ApricieUure. 



The present paper is the result of recent investigations conducted 

 cluefly to ascertain the names of economic species to be used in forth- 

 coming papers on their biology. 



^ In this paper species transferred from one genus to another are 

 given as headings in which the former genus in parentheses precedes 

 the later genus. . These species are arranged alphabetically accordinc^ 

 to the later genus, as for example (EpMaltes) CaUispUaltes comstochi 

 (Cresson), p. 633. 



Superfamily APOIDEA. 

 Family ANDRENID.^. 

 Genus ANDRENA Fabricius. 

 Andrena Fabricius, Syst. Ent., 1775, p. 376. 

 Many species originally included. 

 Type. — Apis lielvola Linneus, by present designation. 



ANDRENA SAUNDERSI, new name. 



Andrena nigriventrls Saunders, Trans. Ent. Soc. Lond., 1908, p. 208, not of 

 Perez, Procea Verbaux Seances Soc. Linn. Bordeaux, vol. 57, p. 170 (p. 21 

 in reprint), 1902. 



Named for the late Edward Saunders, of England, as a slight token 

 of appreciation of his kindness toward his colleagues. 



Superfamily ICHNEUMONOIDEA. 

 Family BRACONID.E. 



APANTELES (APANTELES) ARISTOTELIiE, new species. 



1/aZe.— Length, 2.5 mm.; head apparently wider than long, black, 

 antennae blackish or dark brown throughout, palpi stramineous; 

 thorax, including tegulse and coxae, black or blackish, fore femora 

 mostly blackish, pale at apex, mid and hind femora entirely blackish, 

 fore tibiae and tai-si rather pale, mid and liind tibia? and tarsi mostly 

 blackish or dark brown, the tibia3 pale basally, wings, including most 



Proceedings U. S. National Museum, Vol. 42-No. 1 920. 



613 



