DESCRIPTIONS OF SOME NEW SPECIES AND GENERA OF 

 LEPIDOPTERA FROM MEXICO. 



By Harrison G. Dyar, 



Custodian of Lepidoptera, U. S. National Museum. 



Among the undescribed forms of Lepidoptera that have accumu- 

 lated in the collections of the U. S. National Museum, the following 

 have been received from the Republic of Mexico, and are accord- 

 ingly characterized in one paper. 



Family SYNTOMID/E. 

 Genus PSEUDOSPHEX Hubner. 



PSEUDOSPHEX MELANOGEN, new variety. 



As in Pseudosphex polistes Hubner, but the abdomen black. Head 

 black, the face and occiput yellow; antenna 1 blackish brown; thorax 

 black, the tegulae bordered before and behind with yellow, the pata- 

 gia yellow in the center and on both margins; a yellow mark on the 

 disk behind. Abdomen black above, the segments with distinct pos- 

 terior yellow borders. Wings hyaline, the fore wing A^ellowish in the 

 cell with a broad smoky brown band beyond the end of the tell to 

 the apex. 



Santa Rosa, State of Vera Cruz, Mexico, August, 1906 (W. Schaus). 



Type.— Cat. No. 12936, U.S.N.M. 



Another specimen from the same locality has a typical brown abdo- 

 men, while a third has the black partly replaced by brown, showing 

 the form to be a variety of Pseudosphex polistes. 



Genus SPHECOSOMA Butler. 



SPHECOSOMA NIGRIFER, new variety. 



As in Sphecosoma angustatum Moschler (=gracilis Klages), but the 



abdomen black with broad apical segmental yellowish hands. The 

 antennae are black on the shaft and the legs are without any \n\ 

 tint. 



Santa Rosa, State of Vera Cruz, Mexico, August, 1906 (\Y. Schaus . 



Type.— Cat. No. 129)37, U.S.N.M. 



Proceedings U. S. National Museum, Vol. 38— No. 1742. 



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