JAMES A. G. REHN AND MORGAN HEBARD 249 



very small, short, procumbent spines. (In the series ventro-cephalic margin 

 of cephalic femora armed with none to three spines; ventro-cephalic margin 

 of median femora with none to five, ventro-caudal of median with one to 

 eight spines.) Cephalic genicular lobe of cephalic and median femora armed 

 with two minute teeth. Caudal genicular lobe of cephalic femora unarmed. 

 Caudal genicular lobe of median femora armed with one minute tooth (in the 

 series sometimes none, rarely two). Genicular lobes of caudal femora un- 

 armed (or in the series one to all supplied with a single vestigial tooth). Cep- 

 halic femora with dorsal surface armed along the caudal margin with four 

 and five (in the series three to five) spines and along the cephalic margin with 

 none or one (in the series none to three) spines. Caudal tibiae armed with 

 three pairs of heavy distal spurs, of which the medio-internal is the longest, 

 nearly as long as the dorsal length of the metatarsus, the medio-external 

 two-thirds as long as the medio-internal, the dorsal pair each two-thirds as 

 long as the medio-external. Plantula slightly over half as long as the dorsal 

 surface of the metatarsus. 



Allotype. — 9 ; same data as type. [Hel)ai'd Collection.] 



Agrees closely with the male, differing in the following respects. Teg- 

 mina represented by rounded pads, which are usually wholly concealed by the 

 pronotum from above (in occasional specimens the extremities of these pads 

 l)roject slightly and are visible from above). Penultimate tergite much more 

 simple but similarly formed to that of male. Supra-anal plate shorter 

 with margins more convex than in the opposite sex. Cercus simple, elongate, 

 conical, moderately incurved to the aciculate apex, about four times as long as 

 its basal width. Ovipositor elongate, gently upcurved, with acute apex at 

 juncture of valves, the distal portion and margins polished and imspecialized. 

 Antepenultimate tergite produced ventrad on each side in a rounded area, 

 which lies latero-ventrad before the base of the ovipositor and caudad of the 

 lateral rounded flaps of the subgenital plate, extending as far caudad as the 

 caudal margin of the median section of the subgenital plate. ^^ Subgenital 

 plate highly specialized (for carrying the male sperm sac) as in siwp/fx; small 

 lateral portion produced caudad on each side in rounded flaps, large median 

 portion roughly quadrate, medio-longitudinally carinate, with caudal margin 

 transverse and curled upward briefly, lateral margins folded inward for a de- 

 cidedly greater distance, so that in caudal aspect a roughly and I)r<>:iill_\- \- 

 shaped area is formed with the dorsal apices produceil inward. The liiul) 

 armament is apparently similar in the sexes. 



The similarity in structure, particularly that of the pronotum, makes asso- 

 ciation of the sexes of this species an easy matter. 



Surface shining. General coloration a very slightly mottled bister or chest- 

 nut brown. The produced portion of the lateral lobes of the pronotum very 

 dark brown, the remaining ventral margin of the lateral lobes often narrowly 



'^ These are referred to as the sul)genital lobes of the female by ( 'audell 

 in his treatment of this genus. Proc. U. S. Nat. Mus., xxxii, pp. 351-362, 

 (1907). 



TRANS. AM. ENT. SOC, XLVI. 



