NO. 1530. THE DECTICIN.E OF NORTH AMERICA— C A UDELL. 405 



times with a noticable V-shaped one near the center. Prosternum 

 unanned. Elytra of female short, rounded lateral pads, scarcely 

 projecting' beyond the posterior edge of the pronotum, of the male 

 broad, o^ ei'lapping dorsall}' and projecting beyond the pronotum a 

 distance equal to about one-half the length of the pronotum. Legs 

 long, the posterior femora two and one-half times to nearly four times 

 as long as the pronotum, strongly expanded on the basal two-thirds 

 and unarmed beneath or armed with a few small spines; anterior 

 tibia' armed alcove on the outer side only with three spines; abdomen 

 moderateh' plump, scarcely- carinate; subgenital plate of both sexes 

 apicall}- rectangularly incised, that of the male with moderately 

 prominent styles at each side behind; supraanal plate small and apically 

 triangular in both sexes, closely fitted between a pair of compressed 

 infracercal plates, usually hidden ))eneath the last abdominal segment, 

 which, in the male, is mesially incised; cerci of the female simple, 

 cylindrical, pointed, of the male cylindrical with the apex sharp and 

 tooth-like, bent inwards and furnished on the inner side with a sharp 

 tooth; ovipositor very slightly curved upwards and of a length varying 

 from distinctly shorter than the posterior femora to somewhat longer. 



Tijj}<\ — TJiainnofririon frnineatus Thomas. 



The type of this genus was originally described as having the 

 pronotum without carina? but in the description of the genus >^telroxys 

 Herman says that this was probably a clerical error. That this is 

 probabl}' the case is indicated by several facts. Specimens of the type 

 species labelled in the handwriting of Thomas as type specimens are 

 in the National Museum and they have the pronotum carinate. Glover 

 has tigured the species, presumably from authentic specimens from 

 Thomas, and his illustration shows the pronotum to be carinate. 

 Besides this Thomas himself practically admits the correctness of 

 Herman's diagnosis as })ased on frUhwatint." Thus t/-ilhitMtusisfieen 

 to have a carinate pronotum and the statement to the contrary in the 

 original description is to be attributed to a clerical error. 



The classification of this genus is by far the least satisfactory of any 

 of the group here treated. The cerci of the males are either unusually 

 variable for this group or indicate several more species than I have 

 recognized. That the cerci of the males, which are unvarying 

 charactei's of such .synoptic value in other genera of the group, should 

 be so variable as to be useless as a differentiating character in this 

 particular genus is, to sa}' the least, odd. It may, however, eventually 

 result that we have several more species than here considered but at 

 this time I am unal)le to recognize such to be the case. The sexes arc 

 connected only by association with localities, none, so far as I know, 

 having l)een taken in copulation. Color, so far as determinable from 

 the material studied, is of little constancy. About fifty specimens of 



iRept. U. S. Geol. Surv. W. 100 Mer., V, 1875, p. 906. 



