NO. 1124. 7,'/:r/>70Y or THE MELAXOPLTSCUDDER. 37 



and stout, the outer margin of the hind tibiae with nine or ten spines. 

 Extremity of abdomen bluntly rounded (whence the generic name), the 

 lateral margins of the subgenital plate straight from the very base, in 

 no way angulate on meeting apically, but protruding beyond the apex 

 of the supraanal plate by more than half the length of the latter; cerci 

 conical, acuminate, sometimes with an inferior median tooth; furcula 

 wholly wanting. 



Three species occur in northern* Mexico and southern Texas. 



C. bintrif/ata may be taken as the type. C. valya is somewhat aber- 

 rant, and should perhaps be separated generically. 



ANALYTICAL KEY TO THE SPECIES OF CYCLOCERCUS. 



A. 1 Interspace between mesosternal lobes of male nearly twice as long as broad; 



anal cerci of male slender, simple. 



b. 1 Hind femora relatively stout; upper surface of body with a distinct bright 

 stripe running from the upper margin of the eye backward over the region of the 



lateral carinae on each side 1. bistrigata (p. 37). 



I).- Hind femora relatively slender; upper surface of body with at most an obscure 

 stripe in the region specified 2. accola (p. 38). 



A. 2 Interspace between mesosternal lobes of male subquadrate; cerci of male stout, 



with an inferior median tooth 3. valga (p. 39). 



i. CYCLOCERCUS BISTRIGATA, new species. 

 (Plate III, fig. 4.) 



Dark almost blackish chocolate brown, striped with bright yellow 

 testaceous. Head testaceous, often clouded, occasionally mottled, with 

 fuscous, the summit to below the middle of the eyes posteriorly blackish 

 brown, with a narrow but widening testaceous stripe behind the upper 

 half of the eyes; lateral margins of the fasti gium, particularly between 

 the eyes, elevated to a rounded ridge, more prominent and rounded in 

 the male than in the female, reversely arcuate; frontal costa moderately 

 broad, subequal, sulcate (more deeply in the male than in the female), 

 above feebly punctate at the sides, occasionally obsolescent at base in 

 the female; lateral carinae of face distinct, slightly divergent; antennae 

 testaceous. Both prozona and metazoiia ruguloso-punctate in the 

 male, the prozona coarsely, bluntly and rather sparsely punctate in 

 the female; pronotum with the postocular testaceous stripe of the head 

 continued, in the male as a slender, sharply defined stripe across both 

 prozona and metazona, in the female as a slightly broader stripe across 

 or nearly across the prozona only, fading posteriorly and less sharply 

 defined above; episterna testaceous; meso- and metathorax and abdo- 

 men of male blackish above, with a broad mediodorsal testaceous stripe, 

 and testaceous below; of female more or less blackish along the middle 

 of the sides, sometimes margined above with a broad, posteriorly 

 evanescent, often broken, testaceous stripe, generally almost or quite 

 obsolete, the dorsum proper brown. Interval between the mesosternal 

 lobes of male nearly twice as long as broad. Tegmina slender, linear, 

 very slightly and regularly enlarging to the well rounded tip, about as 



