IDOL J NATURAL SCIENCES OP PHILADELPHIA. 519 



abdomen. A number of other characters exhibit more or less apparent 

 differences, such as the shape of the eye and the vertex, the more gib- 

 bous anterior and median femora of the male, and the longer posterior 

 limbs. 



Genus BOOPEDON Thomas. 

 1S70. Boopedon Thomas, Proc. Acad. Nat. Sci. Phila., 1870, p. S3. 

 Included B. nigrum Thomas { = Gryllus nuhilus Say) and B. flavo- 

 fasciatum Thomas. 



Boopedon nubilum (Say). 



1825. GfrijJlus] nuhilus Say, Jour. Acad. Nat. Sci. Phila., IV, p. 308. [Arkan- 

 sa . near the base of the Rocky Mountains"; probably referring 



to the country at the exit of the Arkansas River from the mountauis.] 



Casas Grandes, Chihuahua. September, 1902. (Dr. W. E. Hughes.) 



Two males. 



These individuals are both of the black type of coloration, and in 

 one the pregenicular annuli of the posterior femora are absent. 



Boopedon hoagi n. sp. 

 Type: d^ ; La Joya, San Luis Potosi, Mexico. August 10, 1903. 



(M. E. Hoag.) 



Allied to B. nubilum, but differing in the smaller head and the longer 

 and more distinctly carinate pronotum, the metazona of which is 

 strongly punctate. 



Size medium (equal to the male of nubilum); form moderately 

 elongate, subbrachypterous, as is usual in the genus. Head of medium 

 size, face moderately declivent, occiput rounded, hardly elevated above 

 the pronotum, no distinct median carina present but with an exceed- 

 ingly faint one on the fastigium; fastigium considerably broader than 

 long, anteriorly obtuse-angulate, not excavated, margins very slightly 

 elevated ; lateral f oveol® linear, slightly marked ; interspace between 

 the eyes hardly narrower than the fastigium; eye subovate, anteriorly 

 somewhat truncate, slightly longer than the infra-ocular portion of 

 the geme; frontal costa moderately broad, subequal, not quite reach- 

 ing the clypeus, slightly excavated at the ocellus; antennae about 

 equal to the tegmina in length, somewhat depressed in the apical half, 

 apex acute. Pronotum with the disk subequal in width, prozona and 

 metazona subequal in length; anterior margin subtruncate, posterior 

 margin obtuse-angulate ; median carina very distinct, moderately high, 

 lateral angles sharp but not truly carinate; metazona strongly punc- 

 tate ; lateral lobes higher than long, the inferior margin obtuse-angu- 

 late. Tegmina slightly shorter than the abdomen; greatest width 

 one-third the distance from the base, costal expansion very large; 



