AMERICAN ENTOMOLOGY. 83 



Desc. — Male. Body greenish-brown, without any rudiment of 

 hemelytra ; head yellowish with three dilated fuscous vittoc ; 

 antenna; brown : anterior thighs unarmed, simple, bright green : 

 tibia dull green, tip and tarsus testaceous ; intermediate thighs 

 dilated, angulated, pale ochreous, annulatcd with brown, the in- 

 ferior angulated lines slightly serrated; a prominent, piceous, 

 acute, robust spine beneath near the tip ; tibiae greenish, slightly 

 serrated on the inner side; tarsus testaceous; posterior thighs 

 brownish, ochreous, with a prominent, piceous, acute, robust spine 

 near the tip beneath. 



Female. Body cinereous, more robust than that of the male : 

 thighs nearly equal, intermediate and posterior pairs with the 

 subterminal spines very short. 



Ohs. I first published an account of this species in " Long's 

 second Expedition," from a male specimen obtained near the 

 Falls of Niagara on a Hickory tree. I had previously found an 

 individual in Missouri, and recently on a journey with Mr. 

 Maclure, I found several specimens on the sheltered foce of a 

 rock at Franklin, New Jersey; amongst these was the female 

 which we now make known. 



Since the above was written, Mr. Charles Pickering, of Salem, 

 Massachusetts, has informed me that he obtained an individual 

 near that city. 



The left figure of the plate represents the female. 



The right hand figure, the male. 



Spectrum bivittatum. — Specific character. Brown or black- 

 ish, with two yellow dorsal vittae. 



Desc. — Male. Body above black, with two broad yellow vittas 

 extending from the base of the antennae to the posterior ex- 

 tremity of the body : antennae dull reddish brown, not much 

 elongated : beneath dull yellowish clay color : feet dusky, thighs 

 unarmed, blackish towards the tip. 



Female, much larger than the male, the body brownish in 

 those parts which on the male are black, with the exception of 

 the vertebral line which is black ; the yellow vittae become some- 

 times obsolete towards the posterior part of the body : thighs 

 Unarmed. 



Ohs. The disparity of size between the sexes of this species^ 

 would almost lead us to doubt their specific identity, or at least 



