259 



II. Sixth antennal joint as long, or very nearly as long, as the first. 



t 6. unidentata Pal. Ferrugiuous ; autennaj paler, 11-joint- 

 ed; pronotuin also paler, no longer than broad, 

 scarcely narrower than the head; tegmina twice as 

 long as the pronotum ; wings pale yellowish, as long 

 as the pronotum ; legs pale ferruginous; forceps (of 

 female?) nearly straight, scarcely bent inward, with, 

 a small postmedian inner tooth, the apex blunt, in- 

 curved. Body?"""; forceps 2'""' . St. Domingo. 

 7. rotundata Scudd. Dark mahogany-brown ; antennse 

 lOjointed, the basal joint, like the palpi, reddish- 

 brown, beyond duskier ; pronotum nearly as broad as 

 the head, scarcely longer than broad, reddish-luteous, 

 paler on sides; tegmina abouthalf as long again as the 

 pronotum, brownish luteous ; wings blackish; legs 

 luteous; abdomen broad, blackish toward the base; 

 forcei^s of male unknown, of female scarcely one-third 

 as long as the abdomen, simple, separated, straight, 

 incurved at tip. ■ Body 6"""; forceps 1.5""". Mexico. 

 1 8. annulata Fabr. Black ; antenufe 13-jointed, the first 

 and penultimate joints with the mouth-parts pale; 

 pronotum flat, the margin pale; legs pale, the femora 

 with a fuscous annulatiou ; forceps short, unarmed. 

 Of small size. West Indies. 



Page. 



Thermastris Cliontalia 249 



Saussurei 249 



Labidura riparia 250 



advena 250 



Psalis gagatina 250 



procera . 251 



americana 251 



Anisolabis azteca 251 



maritima 251 



Spongophora brimneipennis 252 



prolixa 252 



parallela 252 



f orf ex 252 



Index of species. 



Page. 



Neolobopliora volsella 253 



Ancistrogaster gulosa 253 



spinax 254 



Porflcula albipes 255 



bimaculata 255 



Percheroni 255 



lugubris 255 



auriciilaiia 255 



teniata 255 



tolteca 256 



exilis 256 



caUfornica 256 



pulchella 25(5 



Page. 



Porflcula acnleata 256 



ruficeps 256 



vara 257 



elongata 257 



Labia Burgessi 258 



brunnea 258 



guttata 258 



mehincholica 258 



minor 259 



unidentata 259 



rotundata 259 



annulata 259 



^ Note on the fossil species. 



In tbis bulletin (M, 447-448), to which the reader is referred for full 

 particulars, I described Lahidura tertiaria from the Tertiary beds near 

 Castello's ranch. South Park, Colo. By some accident, I described the 

 single specimen known as a female; it is a male. A second specimen of 

 this species, too broken to determine the sex, from near Florissant, Colo, 

 (perhaps the same locality as the preceding), has been kindly placed in 

 my hands by Prof. A. E. Foote. It shows that the species should hardly 

 be referred to Lahidura, but it seems to agree quite as little with any 

 other living genus. Both the specimens, however, are too imperfect in 

 the parts necessary to be studied in determiidng genera in this group, 

 and especially in the tarsal and antennal joints, to warrant any change, 

 and I await more material to determine the precise relationship of the 

 animal. 



Another specimen from near Florissant (Prof. A. E. Foote) evidently 

 belongs to the same genus as the preceding, but differs specifically, and 

 mskj he GinWed Lahidura Uthophila. It is a female; the body, is much 

 flatter than that of Lahidura tertiaria, the abdomen being equal on a 

 side-view, and the whole surface appears to be minutely punctulate ; the 



