October 181^5. J 



PsrciiE. 



295 



most of the eastern States, although at 

 present known only from southern 

 N. E., N. J., and M("l. 



GROUP III. CoLi.ARE Series. 



Carina of proiiotuiii cristate, strongly 

 compressed except on hind part of pro- 

 zona which is joined liroadlv to it. 

 Lateral carinae well-marked. Hind 

 margin chiefly acute-angled with exca- 

 vated sides. 



Syiopsh of Species. 



A. Carina of pronotujn very high, 

 about equal in height to the 

 width of one-half of the disc of 

 the metazona, laminate; body 

 compressed. crista turn. 



AA. Carina only one to tvvo-thiids as 

 high as the width of one-half of 

 disc of metazona. Boily not or 

 relati\(.-Iy little compressed. 



col la re. 



It is impossible to give any key which 

 will enable the novice to determine the 

 suliordinate forms treated as races of 

 collare with any degree of certainty, 

 but the following tabulated statement 

 of the more important comparative dif- 

 ferences will be found helpful. Addi- 

 tional aid may in some cases be derived 

 from the figures and comparisons given 

 in my paper on the New England 

 species. 



Eyes. 



angustipetnu sub-com- 



pressed 



{Smaller fori>ts) 



xvyommgia- quadrate 



nittn 



fiMidum quadrate 



large 



large, in ,} 

 prominent 



noderate 



Heigitt 0/ 

 carina. 



Co7ui^ctiov 0/ 

 Angulation 0/ proximal/:iscoiis 

 bands on iiiside of 

 hind femora. 



post, process. 

 rectangular 



high 



variable, but 

 rather high 



moderate ; low 

 on metazona 



rectangular ? 



acute 



rectangular 



not or but 



slightly both in 



amount and 



degree 



broadly, with 



dark fuscous or 



black 



not or but 

 faintly 



Teguiina . 



not or but faintly widest at costal 

 dilatation ; dis- 

 tinctly arcuate to- 

 ward apex 



not or but 

 faintlv 



of equal breadtli 

 throughout ; very 

 slightly arcuate to- 

 ward apex 



Spharagemon cristatum Scudder. The elevation of the crest f)f the pro- 



notum in this species, while tlie best 



Spharagemon cristatum, Scudder, diagnostic character with which I am 



Proc. Boston soc. nat. hist., xvii. 470. acquainted, varies much individually in 



