462 PROCEEDINGS OF THE ACADEMY OF [June, 



and desert regions of the West, it is found more or less isolated at a 

 great number of localities. Brachypterous individuals somewhat 

 outnumber the macropterous. Though the specimens in each respect- 

 ive series from Texas, from Nevada, and from Vera Cruz, Mex., are 

 quite similar, each series has a decidedly distinctive appearance; 

 intermediates between these are, however, always to be found. 



The general resemblance to A^. carolinus neomexicanus is sometimes 

 so very close that, were it not for the fact that in this species the 

 disto-dorsal spurs of the caudal femora are unequal, while in carolinus 

 neomexicanus they are equal, it would be impossible to distinguish 

 some of the males of the two, though the females are readily separable 

 by the very different characters of the ovipositor as well. 



So different are individuals from the Texan region, the arid South- 

 west and southern Mexico, that there is little wonder that several 

 synonyms of the present insect exist, and it would seem advisable to 

 recognize at least three geographic races, were it not for the fact 

 that practically all of the differences are due to coloration, probably 

 caused by the immediate environment and, as would be expected 

 in such a case, every conceivable intergradation is found in the large 

 series before us. 



The insect differs from N. cubensis in being less slender, in having 



Fig. 23. — Nemobius cubensis mormoniiis. Ovipositor of specimen from Texas. 

 (Greatly magnified.) 



a different color pattern, and in being more mottled and almost 

 always considerably paler in general coloration. The color pattern 

 and its variations, consequently important in determining the present 

 insect, is fully treated in the Color Notes. 



Described from two females and a nymph from a single locality. 



Single type here designated: 9 ; St. George, Utah. April. 

 (Palmer.) [Scudder Collection.] 



We here describe the paratypic female now in the Hebard Col- 

 lection ex Bruner. 



Size small; form not as slender as in N. cubensis, rather compact; 

 head small, full, and rounded, wider than cephalic width of pronotum. 

 Eyes and maxillary palpi much as in cubensis. Pronotum with length 

 almost equal to caudal width, narrowing very little cephalad. Teg- 

 mina short, covering little over half of abdomen, three-fifths the 



