68 STUDIES IN AMERICAN TETTIGONIIDAE (oRTHOPTERA) 



that species than with the other ineml)ers of this species group — 

 testacetis and pacJnjmerns. The present form and davisi may prove 

 to be geographic races of the same species, but more conclusive 

 evidence than we possess will be necessary to warrant us in so 

 considering them. Proof of intergradation of the two in the Vir- 

 ginian mountains would make such action necessary. 



In both sexes of monticola the eyes are somewhat more promi- 

 nent than in darisi, the lateral angles of the pronotal disk are 

 more sigmoid and more decidedly incurved caudad, while the 

 contrast between the inflated proximal and slender distal portions 

 of the caudal femora is more apparent and the latter section is 

 relatively longer than in davisi. The male sex can also be 

 separated from that sex of davisi by the marginal field of the 

 tegmina being broader proximad and narrowing distad, instead 

 of quite narrow and subequal as in davisi. The female sex of 

 monticola can also be chstinguished from that of davisi by the 

 distinctly arcuate distal portion of the ovipositor, which is there 

 distinctly upcurved and has an appreciable concavity to the 

 dorsal margin, by the distal section of the ovipositor also narrow- 

 ing to the submedian tip and by the median incision of the sub- 

 genital plate being broader and rounded at the bottom, thus in 

 general more U-shaped. 



Morphological Notes. — In this species the extremes of variation 

 of pronotal form are very decided, being due not so much to 

 the variation in width of the metazonal portion of the disk as 

 to the variation in width of the greatest constriction of the 

 carina of the prozona. All of the individuals with the more 

 constricted form of pronotum are from the more northern 

 (Virginia and West Virginia) or more elevated (Linville, Black 

 Mountains, Jones' Knob) localities and the least constricted 

 ones are from lower (Valley of Black INIountains, Lake Toxa- 

 way) or more southern (Pinnacle Peak) points. This corre- 

 lation may be accidental and due to the small size of the series 

 examined or it may be supported by collections made in the 

 future. That this cephalic constriction is entirely independent 

 of the varying proportion of the greatest caudal width to length 

 is evident in figuring out, from the measurements, the ratios of 

 the two. The greatest width varies in the males from 64 to 78 

 per cent of the length, in the females from 64 to 72 per cent. 

 When the males showing the greatest amount of difference in 



