230 NORTH AMERICAN EUMASTACINAE (oRTHOPTERA) 



The present location of these specimens is in the Scudder Col- 

 lection at the Museum of Comparative Zoology, Cambridge, 

 Massachusetts. 



Description of Male. — (Mount Wilson, San Gabriel Mountains, Los Angeles 

 County, California. Elevation, 5000 feet. September 15, 1908. Collected 

 b}^ Fordyce Grinnell Jr. [Acad. Nat. Sci. Phila.]) Size medium. Head with 

 profile of occiput arcuate, elevated appreciably dorsad of the pronotum; fasti- 

 gium with angle in profile slightly more acute than a right angle, when seen from 

 the dorsum moderately projecting, subtruncate with the lateral angles well 

 roimded : facial line arcuate in profile, the regular curve not broken by a pro- 

 jection to the fastigio-facial angle; frontal costa very strongly indicated, mar- 

 gins markedly carinate, very narrow ventrad of the insertion of the antennae, 

 the marginal carinae subattingent between the antennal bases, sinuate diver- 

 gent dorsad of the antennae to the fastigium, the floor of the costa in this section 

 plane and with a faint median cannula dorsad; suj)plementary facial carinae 

 decided, subparallel, continued around ventro-cephahc border of the eyes to the 

 antennal bases: eyes prominent, moderately inflated, ovate in basal outline, 

 the greatest depth of eye sUghtly more than twice that of the infra-ocular por- 

 tion of the genae: antennae appreciably longer than the dorsal length of the 

 pronotum, composed of thirteen to fourteen joints, slender, subcyUndrical 

 proximad, slightly depressed and subspatulate distad, apex very acute. 



Pronotum simple, sellate, with dorsal line practically straight in profile: 

 cephalic margin of disk truncate, caudal margin of disk with a shallow, broad 

 emargination; dorsal carina distinct but low, subobsolete cephalad; cephalad are 

 present faint indications of diverging lateral carinae: lateral lobes distinctly 

 longer than deep, the depth contained nearly twice in the length of the same; 

 cephalic margin and the ventro-cephahc angle broadly arcuate, ventral margin 

 sinuato-trimcate, ventro-caudal angle rounded rectangulate, caudal margin 

 truncate; a distinct median sub vertical section of a transverse sulcus indicated 

 on the lateral lobes. 



Cerci moderateh' compressed, in section excavate on the internal face, with a 

 convexity on the external face and shghtly flattened proximo-dorsad ; in form 

 moderately longitudinal, the proximal hah subequal in depth and straight, the 

 distal section decurved attenuate to the distinctly aciculate apex, which is not 

 recurved. 



Limbs slender. Cephalic femora shghtly shorter than the combined length 

 of the head and pronotum, cephahc tibiae subequal to the femora in length. 

 Median femora shghtly shorter than the cephahc femora. Caudal femora 

 three-fourths as long as the body, caudal tibiae subequal in length. Caudal 

 tarsi equal to two-fifths of the length of the caudal tibiae, the proximal joint 

 but faintly shorter than the second and third combined, the second about two- 

 thirds the length of the third. 



Description of Female. — (ISIount Lowe, San Gabriel Mountains, Los Angeles 

 County, Cahfornia. Elevation, 5200 to 5600 feet. August 8, 1907. Collected 

 by M. Hebard. [Hebard Collection.]) The characters here given are those of 

 difference from the male sex. 



