336 TERTIARY INSECTS OF NORTH AMERICA. 



generally narrowing abruptly as the sutura clavi is crossed ; the distal fork 

 is directed toward the tip of the sutura clavi, but is dissipated and broken 

 into flecks before reaching it ; the subapical, slender, oblique, costal stripe 

 is much as in P. cincta, but runs in the opposite direction and is more 

 variable and almost always accompanied by an opposed, large, fuliginous, 

 subquadrate, subapical cloud on the inner maigin. 



This appears to be one of the largest species, but is subject to consider- 

 able variation, one of the specimens referred here being one of the smallest. 



Length of body, 11"""; breadth of thorax, "4""" ; length of tegmina, 

 8.8°"" ; breadth of closed tegmina together, 6°"". 



Florissant. Twelve specimens, Nos. 43, 854, 2101, 3864, 6058, 8233, 

 8536, 10364, 10689, 12090 and 12472, 14200, and of the Princeton Collec- 

 tion 1.836. 



4. PalAPHROBES OBLIQUA. 

 PI. 21, Fig. 10. 



This species, which seems to be rare, is slenderer than the others, but 

 related pretty closely to the last, though it has some peculiarities tending 

 in another direction. The body is uniformly dark, and the ground of the 

 tegmina dark with the same dark basal patch found in all the preceding 

 species ; in this, however, the median band is not developed into two forks, 

 as in the last species, with the proximal fork the stronger, but there is no 

 sign of a proximal fork unless a slight general cloudiness in this direction 

 may be looked on as a relic of the same ; the distal fork, however, is well 

 developed, united, or almost united with, and in any case directed toward 

 so as to involve, the subapical spot of the inner margin found also in the last 

 species; in addition, as if in recognition of the superinduced obliquity of 

 the median band, the subapical costal striga has become more oblique than 

 in P. irregularis, and there is a slight, slender, transverse marginal cloud. 



Length of body, 10.5°""; of tegmina, 6.25"^"'; breadth of thorax, 3°"". 



Florissant. Two specimens, Nos. 8887, 9631. 



5. Palaphrodes transversa. 



This species, represented by only a single specimen, differs much more 

 widely from the others than they among themselves. It is broader oval 

 than they, and the markings are quite differently located. The head and 

 body are light instead of dark, with a straight, broad, transverse, dark belt 



