1913.] NATURAL SCIENCES OF PHILADELPHIA. 445 



Descnptio?i of Allotype. — Very similar to female. Tegmina similar 

 to those of N. fasciatus. Wings absent. Proximo-internal spine 

 of caudal tibia as in fasciatus. Spurs and spines of caudal tibiae 

 distinctive, as given in description of subgenus. 



Measurements {in millimeters) . 



San Jose, 

 Mescico, Mex. Costa Rica. 



Type 9. Allot j-pic cf. c? 



Length of body 9.2 8.4 7.5 



Length of pronotum 1.9 1.9 1.9 



Caudal width of pronotum 2.4 2.3 2.3 



Length of tegmina 4 . 5.2 4.4 



Length of caudal femur. 6 . 6 . 6 . 



Greatest width of caudal femur 2.3 2.3 2.1 



Length of ovipositor 4.7 



Color Notes. — General coloration of head, pronotum, tegmina, and 

 abdomen clove brown; the dorso-caudal jDortion of the occiput is 

 russet, this marking extending on the sides of the head as a narrow 

 line which borders the caudal margin of the eyes, the remaining 

 post-ocular portion of the gense being of the darker general colora- 

 tion. In front of the paler marking of the occiput there is an indica- 

 tion of four very narrow and faint longitudinal lines of this color 

 and the dorsum of the pronotum is also minutely dotted with russet. 

 In the female the intermediate channel of the tegmina is broccoli 

 brown, in the male wood brown. The limbs are bistre in the female, 

 drab in the male. Ovipositor dark burnt umber. 



The specimen from Costa Rica was taken when it had recently 

 reached the adult condition ; this specimen shows scarcely any 

 cephalic markings. 



Distribution. — The present species is known only from ^Mescico, 

 Mex., and San Jose, Costa Rica. 



Synonymy. — It is surprising that Scudder, in 1896, considered his 

 specimens of this aberrant species to be the same as the very different 

 Nemohius cuhensis mormonius, which insect he then erroneously 

 believed to be Nemohius mexicanus Walker. 



Specimens Examined. — 13: 6 males and 7 females. 



Mescico, Mexico (near), (E. Palmer) 5 cf, 7 9. Type, Allotype, Paratypes. 

 [Scudder Collection.] 



San Jose, Costa Rica (border of river Maria Aguilar), June, 1905. (P. BioUey) 

 1 cf [A. N. S. P.]. 



Subgenus ARGIZALA Walker. 



The subgenus is monotypic. Type of subgenus — Nemohius 

 hrasiliensis [Argizala hrasiliensis] (Walker). 



