664 FAMILY VIII. GRYLLIDJE. THE CRICKETS. 



KEY TO EASTEEX GENERA OF MOGOPLISTIN^E. 



a. Facial protuberance between the antennas very convex and with a dis- 

 tinct but shallow median vertical groove; pronotum of male dis- 

 tinctly widening from apex backward and prolonged behind in the 

 form of a rounded lobe; tegmina present in male but often wholly 

 concealed; fore tibiae with a tympanum on outer face. 



I. CYCLOPTILUM. 



oa. Interantennal protuberance subdepressed. without a vertical groove; 

 pronotum of male not or very feebly widened backward, its hind 

 margin truncate; tegmina and wings absent in both sexes; fore 

 tibiae without a tympanum on outer face. II. OLIGACANTHOPUS. 



I. CYCLOPTILUM Scudder, 186Sb, 142. (Gr., "circle" -f "wing.") 

 In addition to the characters above given the members of this 

 genus have the head very small ; antenna? very long and slender, 

 widely separated at base, first joint large, the others much smaller, 

 subequal; pronotum about half the length of body, male, shorter 

 and subquadrate, female; tegmina of male either projecting be- 

 yond prouotum or wholly hidden, the tips of the dorsal field 

 strongly curved and lateral field well developed ; abdomen de- 

 pressed nearly equally broad throughout, slightly tapering at 

 apex; hind femora much dilated, more than twice as long as 

 broad ; hind tibia? with three pairs of apical spurs, the upper in- 

 ner ones shorter than the lower ones; basal joint of hind tarsi 

 sulcate above, serrate on both margins, 79 ending in an apical spur 

 each side ; anal cerci tapering, more than half as long as abdomen. 

 Ovipositor straight, variable in length, its apex not serrulate be- 

 neath. 



KEY TO EASTERN SPECIES OF CYCLOPTILUM. 



a. Pronotum of male short and broad, its length about one-fourth more 



than its greatest breadth, its hind margin almost semicircular; 



ovipositor short, not over 3.5 mm. in length. 316. SQUAMOSI M. 



aa. Pronotum of male longer, less broad proportionally, its length nearly 



one-half more than its greatest breadth, its 

 hind margin less broadly, rounded and 

 basal third less flattened; ovipositor 

 longer, 4.5 or more mm. 



b. Terminal joint of maxillary palpi moderately 

 elongate, widening feebly from base to apex, 

 but slightly obliquely truncate. 



317. ANTILLARUM. 



Fig. jis. Maxillary l>b. Terminal joint of maxillary palpi shorter, 

 of P C. 0i anMlar 1 : of strongly widening from base to apex, very 



trigompalpum, greatly en- obliquelv truncate (Fig. 218, &. ) 



larged. (After R. & H.) 



318. TRIGONIPALPUM. 



Scudder in his key (18970, 64) says: "First joint of hind tarsi neither sulcate nor 

 serrate, ' but an examination of the generic type, C. sqnamostim, by Davis showed he 

 was mistaken. 



