1905.] NATURAL SCIENCES OF PHILADELPHIA. 795 



weakly suffused with reddish brown as is the case with the tegmina. 

 The shape and proportions of the pronotum readily separate this 

 species from »S'. montana. 



PSETJDOMIOPTEKYX Saussure. 

 Pseudomiopteryx infuscata Saussure and Zehntner. 



Cache, altitude 1,000 meters. May, 1905. In forest. [No. 16.] 

 (P. Biolley.) One male. 



Family PHASMID^. 

 BOSTRA Stal. 

 Bostra turgida (Westwood). 



18.59. Bacteria turgida Westwood, Catal. Orthopt. Ins. Coll. Brit. Mus.. 

 Phasm., p. 28, PL VIII, figs. 4 and 9. [Venezuela.] 



Cache, altitude 1,000 meters. May, 1905. [No. 24.] (P. Biolley.) 

 One male. 



As far as can be determined from the broken male figured and de- 

 scribed by Westwood, this appears to be the same species. It is, how- 

 ever, somewhat smaller, and has the antennae longer than in West- 

 wood's figm-e and equal to the body in length, instead of reaching 

 "rather beyond the middle of the metathorax." 



The species of the genus Bostra in hand for study are four: incomptn 

 Rehn,^ jaliscensis Rehn,'* jugalis Rehn-^ and turgida Westwood. The 

 males of all these species are now before me and can be separated by 

 the following key: 



a. — Cerci not exceeding the subgenital opercule proper (i.e., the eighth 

 ventral segment) in length. 

 b. — Ninth dorsal abdominal segment somewhat bullate, the caudal 

 margin bilobate, with the median emargination subtrigonal. 

 Subgenital opercule without a distinct claw-like process. 

 c. — Median segment in length not exceeding one-half the re- 

 maining portion of the metanotmn. Cerci slightly 



tapering, B. turgida (Westw.). 



cc. — Median segment in length nearly equal to the remaining 

 portion of the metanotum. Cerci not tapering, 



B. incompta Rehn. 

 bb. — Ninth dorsal abdominal segment longitudinal, subequal, hot 

 bullate, the caudal margin laterad acute-angulate and brace- 

 shaped'' between. Subgenital opercule with a distinct 

 claw-like process ventrad of the caudal margin, 



B. jaliscensis Rehn. 



3 Proc. Acad. Nat. Sci. Phila., 1904, p. 57. [San Carlos, Costa Rica.] 



* Ibid., 1904, p. 514. [Tuxpan, Jalisco, Mexico.] 



^ Invertebrata Pacifica, I, p. 72. [Chinandega, Nicaragua.] 



* Shaped thus , -^ s . 



