340 PROCEEDINGS OF THE NATIONAL MUSEUM. vol. xxxii. 



are quite rare, though occasionally some species are not uncommon in 

 certain localities. In food habits they are probably both herbivorous 

 and carnivorous. 



Separate tables ai'e given for the separation of the two sexes of 

 these insects. This was found desirable as it makes easier the deter- 

 mination of the species. 



KEY TO THE SPECIES OP STIPATOR — MALES. 



A. Cereal tooth situated much beyond the middle of the cercus, as thick, or almost 

 as thick, and as long, or longer, than that portion of the cercus beyond it, api- 

 cally rounded. 



B. Size large, pronotum 11-16 mm. in length americanus, p. 341 



B'. Size small, ])ronotum 5-8 mm. in length. 



C. Posterior femora longer, armed on the inner inferior carina with several small 

 but distinct spines; prozona nearly as convex posteriorly as anteriorly and 



the posterior border well rounded bruneri, p. 343 



C^. Posterior femora relatively shorter, inconspicuously armed on the inner 

 inferior carina with a few very minute spinules; prozona slightly 

 flattened posteriorly and tlie posterior margin usually more truncate 



sievensonii, p. 344 



A^. Cereal tooth situated about the middle of the cercus, not as thick nor nearly as 

 long as that portion of the cercus beyond it, apically acute. 

 B. Size smaller, pronotum 8-10 mm. in length. 



C. Disk of the pronotum usually no lighter in color than the upper portions of 

 the lateral lol)es and rounded, the lateral carinte not indicated. 



D. Antennfc usually banded. Body more robust (jrandis p. 347 



D'. Antennje uniform in color. Body more slender. 



grandis var. insignis, p. 349 

 C^. Disk of the pronotum always lighter in color than the upper portion of the 

 lateral lobes and slightly flattened, the lateral carin^e often indicated. 



nigroinarginala, p. 346 

 B^. Size large, pronotum 11-13 mm. in length grandis, p. 347 



KEY TO THE SPECIES OF STIPATOR — FEMALES. 



A. Large, pronotum 11-16 mm. in length. 



B. General color yellow ; pronotum usually a little flattened posteriori)' and there 

 with a trace of a median carina on each side of which is usually a broad 

 fuscous patch, strongly contrasted with the general color ; ovipositor rarely 



as little as 25 mm. in length americanus, p. 341 



B^. (ieneral color brown or yellowish-brown ; pronotum not flattened posteriorly 

 and without a trace of median carina or fuscous patches ; ovipositor rarely 



over 25 mm. in length grandis, p. 347 



A^. Smaller, pronotum 5-10 mm. in length. 



B. Dorsal surface of the pronotum and the upper half of tlie lateral lobes usually 

 unicolorous ; size variable. 

 C. Posterior femora inconspicuously spined on the inner-inferior carina with a 



few very minute spinules stcvensonii, p. 344 



C. Posterior femora more conspicuously spined on the inner-inferior carina 

 with several small spines. 

 D. Larger, pronotum 9-10 mm. in length ; posterior femora scarcely infuscated 

 apically. 



E. Stouter ; antenii;c usually banded grandis, p. 347 



E^. More slender; antennas uniform in color grandis var. insignis, p. 349 



