352 PROCEEDINGS OF THE NATIONAL MUSEUM. vol. 58. 



KEY TO NOKTH AMEEICAN SPECIES. 



1. First tergite prominently elevated in middle; hind tarsal claws in female with 



basal tooth 2. 



First tergite not prominently elevated in middle; hind tarsal claws in female with- 

 out basal tooth Ontario (Cresson). 



2. Front coxae in female black basally, whitish at apex, in male reddish; face in 



male entirely yellow 3. 



Front coxae tricolored (black, white, and red); face in male more or less 

 black padficus, new species. 



3. Mesoscutum without lateral yellow markings picticomis (Cresson). 



Mesoscutum with yellow markings laterally before tegulae. . . componotus (Davis). 



APECHTHIS PICTICORNIS (Cresson). 



Plate 21, fig. 2. 



Pimpla picticomis Cresson, Trans. Amer. Ent. Soc, vol. 3, 1870, p. 146, male. 



Type, Acad. Nat. Sci. Phila., No. 1416. 

 Pimpla annulicomis Cresson, Trans. Amer, Ent. Soc, vol. 3, 1870, p. 147, female, 



male. Type, Acad. Nat. Sci. Phila., No. 1638. 

 Scambus (Pimplidea?) annulicomis Viereck, Hym. Conn., 1917, p. 321. 

 Scambus (Tromatobia?) picticomis Viereck, Hym. Conn., 1917, p. 322. 



Synonymy and discussion based on examination of types, other 

 specimens in the Academy of Natural Science of Philadelphia, and 

 seven females and two males in United States National Museum. 



The types of the two descriptions are merely color variations. 



In addition to the characters given in the key to species differs 

 from Ontario (Cresson) as follows: Antennae yellow beneath; front 

 coxae mostly black, whitish at apex, sometimes all yellow in male; 

 propodeum with upper hind angles prominent, the lateral face of 

 the propodeum having its upper margin parallel to the pleural carina; 

 punctuation of tergites very dense and sometimes confluent; aver- 

 ages somewhat larger. 



Length. — Female, 11-15 mm.; male, 8-13 mm. 



Distribution. — The type of picticomis is from New Jersey, that of 

 annulicomis from Illinois and the allotype female from Pennsylvania. 

 The series in the National Museum contains specimens from New 

 Brunswick, Ontario, Michigan, Pennsylvania, New Jersey, and Texas. 



Nothing is known of the hosts of this species. 



APECHTHIS COMPONOTUS (Davis). 



Pimpla componotus Davis, Trans. Amer. Ent. Soc, vol. 24, 1898, p. 367, male. 

 Type, Acad. Nat. Sci. Phila. 



The type and only known specimen of this species is very highly 

 ornamented. Structurally it is very much like jyicticomis, and it 

 is possibly an extreme variant of that species. One of the National 

 Museum specimens of picticomis has the positions of the notauli 

 marked with yeUow but lacks the lateral markings of mesoscutum 



