398 PROCEEDINGS OF THE NATIONAL MUSEUM. VOL. xx. 



abdomen in the female ; the extremity strongly clavate in the male and 

 considerably recurved, the supraanal plate triangular with blunt apex, 

 the sides nearly straight, feebly emargin ate just before the middle, but 

 scarcely at all elevated, the median carina very deep in the basal half 

 between high and sharp walls, beyond shallow and feeble but percur- 

 rent; furcula consisting of a pair of approximate, minute, slender, par- 

 allel, blunt fingers, no longer than the last dorsal segment; cerci very 

 long and slender, exteriorly a little tumid, bent arcuate, tapering 

 gradually to the middle to less than half the basal breadth, then bent 

 roundly inward and thereafter equal, blunt-tipped, their tips meeting 

 over the apex of the supraanal plate; subgenital plate short, slightly 

 broader apically than at base, almost twice as long as broad, the lateral 

 margins strongly rounded at base, with the apical margin, as seen from 

 above, very strongly rounded, not elevated, entire. 



Length of body, male, 18 mm., female, 22 mm.; antennae, male, 8.75 

 mm., female, 8 mm.; pronotum, male, 4.2 mm., female, 5.25 mm.; hind 

 femora, male, 10.5 mm., female, 12.5 mm. 



Two males, 4 females. Comancho, Zacatecas, Mexico (L. Brunei-); 

 San Luis Potosi, Mexico, E. Palmer; Mount Alvarez, San Luis Potosi, 

 Mexico, E. Palmer. 



By the kindness of Doctor Aurivillius of Stockholm, I am able to 

 illustrate the male abdomen of StaPs type (fig. 9), which I should have 

 been unable to identify with certainty from the rather meager descrip- 

 tion. I do not find the apex of the hind tibiae black, as Stal states 

 them to be. 



30. APTENOPEDES. 



(ATtrrfv, unfledged; Ttrfddoo, to leap.) 



Aptenopedes SCUDDER, Proc. Bost. Soc. Nat. Hist., XIX (1877), pp. 83-84. 



Body compressed, especially in the female, where it is also feebly 

 fusiform, feebly pilose. Head projecting, front strongly oblique, whole 

 summit of head horizontal, scarcely convex, triangular; eyes nearly 

 meeting above, especially in the male, where they are separated by a 

 space not wider than the narrowest part of the frontal costa, the fastig- 

 jum in front of them laterally expanded and slightly tumid; front sub- 

 appressed, particularly in the female, almost straight; eyes long oval, 

 moderately prominent, in the female depressed and tapering above; 

 antennae moderately slender, linear, subdepressed, about as long as 

 (female) or slightly longer than (male) the head and prouotuin together; 

 palpi rather small, the last joint nearly cylindrical, not in the least 

 expanded. Pronotum regularly expanding posteriorly in the female, 

 only expanding at the very tip and then but slightly in the male; front 

 margin slightly convex, hind margin slightly and angularly excised; 

 surface uniformly rugulose, tectiform, especially in the female, the 

 median carina distinct but not prominent, the lateral carinae wholly 



