112 U. S. NATIONAL MUSEUM BULLETIN 216 parts 



7. Aritranis alLicollaris (Cresson), new combination 



Front wing 5.2 to 9.5 mm. long; clypeus rather short, rather weakly 

 convex, its apex a little impressed on each side of middle so that it ap- 

 pears to have a very weak, blunt, median tooth; thorax moderately 

 elongate; mesoscutum polished, with rather coarse, strong, rather 

 dense punctures; apical carina of propodeum sinuate, more or less 

 bowed forward medially; areolet of moderate size, subpentagonal, 

 definitely higher than wide, the intercubiti weakly convergent forward; 

 second recurrent vein forming a 105° angle with first abscissa of sub- 

 discoideus; first tergite rather short, without a basolateral tooth, 

 without distinct median dorsal carinae but with faint ridges in their 

 places; dorsolateral carina of first tergite rather strong and sharp 

 for entire length of the tergite; postpetiole weakly mat, with a few 

 scattered, rather small punctures; second tergite mat, with moderate 

 sized, moderately strong punctures that are separated by about 0.3 

 their diameter in male, by about 0.4 their diameter in female; oviposi- 

 tor sheath about 0.45 as long as front wing. 



There are eastern and western subspecies, as keyed and described 

 below: 



1. Face white laterally, the rest black, or the face of male sometimes entirely 

 white; seventh tergite black, in the female with a white apical margin; range: 

 Atlantic Ocean to Rocky Mountains in Transition and Upper Austral zones. 



7a. albicoUaris albicollaris (Cresson) 



Face entirely black; seventh tergite ferruginous, without a white margin; range: 



Washington to California .... 7b. albicollaris clypeata, new subspecies 



7a. Aritranis albicollaris albicollaris (Cresson) 



Cryptus albicollaris Cresson, 1872, Trans. Amer. Ent. Soc, vol. 4, p. 158;?. Type: 

 9, Comal Co., Tex. (Philadelphia). 



Punctation a little coarser than in subspecies clypeata, especially 

 on temple and on tergites 2 and 3; groove between face and clypeus 

 moderately strong. 



Male: Head black, the side of face, more or less of cheek, usually 

 the frontal orbit, and clypeus white, sometimes most or all of face and 

 lower part of temporal orbit white; mandible and palpi white; antenna 

 black, its scape fulvous to black, often white in front; propleurum 

 entirely white, partly white, or entirely black; pronotum ranging 

 from black with its collar, hind corner, and part of lower edge white, to 

 mostly white and fulvous with a central spot on each side fuscous; 

 tegula white; mesoscutum entirely black to ferruginous with blackish 

 sutural markings; scutellum and postscutellum white, the smTounding 

 area black; mesopleurum ferruginous, the subtegular ridge white and 

 an area below and behind the ridge black; thoracic sterna and lower 

 part of prepectus partly or mostly black, the mesosternum often with 



