1913.] NATURAL SCIENCES OF PHILADELPHIA. 465 



the type of coloration here described. General color mummy brown, 

 inconspicuously marbled with sepia and bistre. Head raw umber, 

 a very narrow line of darker shade extending across the occiput from 

 the caudal margin of the eyes, the remaining caudal portion of the 

 occiput and postocular portion of the gense somewhat paler than the 

 rest of the head. Eyes prouts brown. Maxillary palpi raw umber, 

 the distal half of the terminal segment clove brown. Pronotum 

 mummy brown clouded with bistre, under a Zeiss binocular small 

 dots of wood brown are apparent. Tegmina translucent; of male 

 with dorsal field a very dark shade of bistre particularly pronounced 

 in the proximal portion, discoidal vein obscurely outlined in cream 

 color, lateral fields clove brown ; of female bistre much suffused with 

 raw umber, the longitudinal veins of the dorsal field, the intermediate 

 channel and ventral margin of lateral fields raw umber, remaining 

 portion of lateral fields clove brown. Dorsal surface of abdomen of 

 males and macropterous females (concealed beneath tegmina) 

 shining black; of brachypterous females, proximal (concealed) 

 portion of the same color, remaining portion black somewhat maculate 

 with raw umber and covered with hairs of the same color. Ovi- 

 positor Vandyke brown. Limbs tawny olive slightly mottled with 

 raw umber, the outer face of the caudal femora marked with two 

 faint longitudinal bars of the latter color. 



The material before us from the state of Vera Cruz, Mex., resembles 

 these specimens, but the majority are somewhat darker with a more 

 russet suffusion, and the markings which give most of the specimens 

 from Texas a somewhat marbled appearance are considerably 

 reduced. The distinctive markings of the head are^^, however, in 

 most cases more pronounced. This type of coloration, as well as 

 intermediates between it and the normal Texan type, is represented 

 by a number of specimens from Texas. 



The majority of specimens from Fort Yuma, Cal, and Lower 

 California, are of a very pale desert type of coloration. So pale 

 are these that the color pattern has in most cases almost disappeared. 

 General color wood brown, faintly marked with a darker shade. 

 Head mars brown, a paler caudal portion of the occiput only detect- 

 able under the Zeiss binocular. Disk of pronotum of general color 



^ Scudder, in his treatment of the specimens which are now before us, and 

 which he wrongly considered N. mexicanus, gave these color characters very well 

 in his key, "longitudinal markings of head interrupted at the crown, the whole 

 back portion immaculate, sharply defined from the portions in front at the 

 summit, which is feebly subcarinate transversely." 



