gcuddet.] 290 [January 23, 



deep blue, and one from Lake Tahoe in which they are very pale 

 green; the markings also vary greatly, but the pronotum seldom 

 appears to possess a very distinct black band on the upper portion of 

 the deflected lobes ; the tegmina may be almost devoid of spots, but 

 generally possess a distinct discal series of quadrate spots. This 

 species has been distributed by Mr. Edwards with the number 94 

 attached. M. cinereus is a peculiar species, very distinct from any 

 yet described. The female wholly resembles the male, and the hind 

 tibiae are always blue ; the black stripe of the deflected lobes of the 

 pronotum is followed beneath by livid tints in broken patches. It is a 

 slender species, with wings longer than the body, the tegmina with a 

 discal series of slender, alternating pale and dark lines and dots ; the 

 posterior lobe of the pronotum, and that only, has rather a prominent 

 median carina. M. Kennicottii is a minute species, only fifteen mil- 

 limetres long, of a dark brown color, with hind tibiae apparently of 

 a reddish yellow color, hind femora barred above with black, and a 

 lateral black stripe on the front half of the deflected lobes of the 

 pronotum. The prosternal spine is very blunt, the median carina of 

 the pronotum is distinct, and nearly equally so throughout ; the teg- 

 mina are blotched along the middle line; the anal cerci are thick, less 

 than twice as long as broad, nearly equal and rounded, resembling 

 most those of M. spretus. 



An examination of the species previously known brings to light 

 one or two points which may be added. Specimens of M. atlantis 

 from the vicinity of Puget Sound are darker, and the tegmina more 

 heavily marked than elsewhere, especially in the female. No blue 

 tibiae have occurred among them. This species was numbered 90 

 and 157 by Mr. Edwards. M. femur-rubrum, on the, other hand, does 

 not appear to differ in the least from average specimens on the Atlan- 

 tic coast; but Dr. Packard brought home a very curious male from 

 Portland, Or., in which the terminal segment of the abdomen is 

 deeply cleft in the middle by an incision which extends nearly across 

 the entire segment. This seems to be due simply to some accident, 

 perhaps in moulting, but it bears an entirely normal appearance, 

 and, occurring just where the segment is notched in C. spretus and 

 its nearest allies, led me at first to place it aside as a distinct species; 

 in every other part of its structure, however, it agrees with ordinary 

 specimens of M. femur-rubrum. Mr. Edwards has distributed the 

 Californian M. femur-rubrum under the numbers 95 and 156. 



M. femoratus (Burm.) has been distributed by Mr. Edwards 

 under the number 161. 



