REHN AND HEBARD 287 



Conocephalus leptopterus^ new species (PI. XXI, figs. 1 and -1; XXII, 11.) 

 This distinctive species would suggest C. sirictus in the robust 

 form, unarmed ventral margins of the caudal femora, unispinose 

 genicular lobes and very long ovipositor, l)ut when examined is 

 found to be widely separated from any known form of the geims. 

 The insect agrees with C. snltai^s in having the caudal tibiae 

 armed distad with but a single pair of spurs, but in the present 

 insect the prosternum is bispinose and the cephalic and median 

 tibiae have their margins armed with seven or eight instead of 

 six spines. In a number of characters the insect is unique. 



Type: 9 ; Tepic, Tepic, Mexico. [Hebard Collection, Tvi)e 

 No. 385.] 



Description of Type. — .Size medium, form robust. Dark medio-dorsal band 

 of head and pronotum continued solid and uninterrupted on abdomen to base 

 of ovipositor. Head with vertex, when seen from lateral aspect, in same hori- 

 zontal plane as occiput, fastigium of vertex narrow but about two-thirds as 

 wide as proximal antennal joint, nearly two ami one-half times as deep as 

 broad, narrowing evenly three-fourths of the distance from apex to facial 

 suture, then subparallel, this whole outline almost imperceptibly concave. 

 Eyes medium for the genus (small for so robust an insect), not strongly pro- 

 truding. Pronotum unusually long anrl of exceptional shape, lateral lobes 

 broadly rounded to the ventro-caudal angle which is distinctly obtuse-angulate, 

 caudal margin straight, very weakly subsinuate, humeral sinus absent, convex 

 callosity exceedingly broad, swollen and conspicuous; the cephahc and caudal 

 margins are strongly oblique to the ventro-caudal angle, which is abnost mesal 

 in position. Tegmina greatly aborted, small rounded i)ads wholly concealed 

 by pronotum; wings absent. Ovipositor very long and slender showing a very 

 weak upward curvature, approximately straight. Subgenital plate broadly 

 shield-shaped, mainly flat, briefly curved upward laterad and embracing the 

 base of the ovipositor, distal rather broad margin of flat surface transverse. 



The measurements of the type are: length of i)ody 13.5, pro- 

 notum 4.2, caudal femur 13.9, ovipositor 30.1 mm. 

 The type is unique, a dried alcoholic individual. 



^3 From Xe7rT6s = minute and 7r7€pw=wing, in allusion to the minute, abor- 

 ted and wholly concealed tegmina found in tlie fcinale sex of this extraordi- 

 nary species. 



TR.\NS. AM. EXT. SOC, XLI. 



