108 Journal New York Entomological Society, t^'o'- xxiii. 



internal spurs longest and subequal in length. The ovipositor is long 

 and very slender with smooth apex but little enlarged ; it is extremely 

 variable in length and varies from rigidly straight to rather strongly 

 curved, this latter condition apparently frequently accentuated in 

 drying. 



In this series of females the extremes of body length are 8.4-12.7 

 mm., those extremes found in the series from Kaiteur and Bartica, 

 British Guiana, respectively. The very large series before us from 

 the latter locality shows that a very great amount of variation exists, 

 irrespective of geographic distribution. As in numerous other groups 

 which we have studied, material is evidently greatly influenced by 

 local environmental conditions. 



The great majority of specimens before us are blackish and shin- 

 ing in general coloration, with wings, when present, contrastingly 

 whitish. Some examples, however, are dark brown with lateral mar- 

 gins of dorsum of pronotum outlined in a paler shade and limbs 

 brown, the ventro-proximal pale portion of the caudal femora in con- 

 sequence not as contrastingly colored. The lateral lobes of the pro- 

 notum are always dark and uniform in color. The head is often 

 narrowly and briefly bistriate on the occiput between the two distinc- 

 tive lateral lines discussed above, which are present in every speci- 

 men before us. These latter lines, in rare specimens, widen distad 

 and overspread the entire interantennal protuberance and adjacent 

 portion of the occiput, giving such individuals an unusual facial 

 aspect. 



The known distribution of this species is defined by the material 

 before us and that quoted in the synonymy when we add to this the 

 record of brcvipcnnis by Giglio-Tos from Gualaquiza, Ecuador, that 

 by Caudell of pnsillus from Sapucay, Paraguay, those of piisillus and 

 brcvipcnnis by Chopard from various localities in French Guiana and 

 that of nitidtilus by Berg from Cerro de Sotoya, Argentina. 



Specimens Examined. — 200; 59 males, 136 females and 5 imma- 

 ture females. 



Jalapa, Vera Cruz, Mexico, i $ [A. N. S. P.] (micr., 1. teg.).^ 



5 The following abbreviations are used : — dk. ^= dark ; micr. = microp- 

 terous ; macr. = macropterous ; 1. =: long ; med. = medium ; pi. ^= pale ; mod. 

 = moderately ; megac. = megacephalic ; sh. ^ short ; v. ^ very ; teg. = teg- 

 mina. 



