88 U. S. NATIONAL MUSEUM BULLETIN 216 



the Japanese Ephialtes laspeyresiae Uchida 1932; an undescribed 

 species from Japan; and the Neo tropic Ephialtes atriceps Cresson 1873. 

 These names are all new combinations in Apistephialtes. 



All but Ascaniae of the five species listed as European, and the 

 Japanese laspeyresiae, and the American variatipes and nucicola have 

 all been reared from the codlin moth (Carpocapsa pomonella) which 

 indicates that the genus commonly attacks Lepidoptera pupating 

 under loose bark, or in similar situations. 



Keys to the Nearctic species of Apistephialtes 



MALES 



(Males of A. masoni and arcticus are unknown.) 



1. Hairs on combined costa and subcosta long, erect, and with curled-over tips; 



first tergite about 2.4 as long as wide apically, wider basally than apically; 

 nervellus usually a little in front of basal vein but sometimes opposite basal 



vein 1. tenuiventris (Holmgren) 



Hairs on combined costa and subcosta normal (short and decumbent); first 

 tergite about 1.65 as long as wide apically, narrower basally than apically; 

 nervellus opposite basal vein 2 



2. Clypeus with a median transverse tooth 7. dentatus, new species 



Clypeus without a median tooth 3 



3. Scutellum fulvous; propodeum with crowded punctures and with low median 



parallel ridges in place of the median longitudinal carinae 4 



Scutellum black; propodeum with sparse punctures and without median 

 ridges 5 



4. Scape in front blackish near base, the apical part white; middle coxa and 



femur more or less fulvous; apex of clasper elongate. 



2. variatipes (Provancher) 



Scape in front entirely white; middle coxa and femur white; apex of clasper 



short 6. petulcus (Cresson) 



5. Scape mostly white in front; white on upper margin of pronotum extending 



from hind corner about two-thirds the distance to notaulus; hind tibia 



white above except at apex 5. nucicola (Cushman) 



Scape black; white on upper margin of pronotum extending from hind corner 

 to in front of notaulus; hind tibia dusky white to fuscous above, its basal 

 0.2± paler 8. coracinus, new species 



FEMALES 



1. Lateral sternites of second to fifth abdominal segments about 5 times as long 



as wide; nervellus usually in front of basal vein, but sometimes opposite it; 

 first tergite about 2.1 as long as wide .... 1. tenuiventris (Holmgren) 

 Lateral sternites of second to fifth abdominal segments about 2 to 4 times as 

 long as wide; nervellus opposite basal vein; first tergite about 1.4 as long as 

 wide 2 



2. Apical half of clypeus sharply separated from basal half by a transverse 



declivity 7. dentatus, new species 



Apical half of clypeus not distinctly separated from basal half, the clypeus 

 without a transverse declivity 3 



