36 The Graspedosomatidse of North America. 



Pseudotremia cavernaruin Cope. 



Pseudotremia cavernarum Cope : Joyia . Am. Philos. Soc, XI, pp. 179 (1869) ;: 

 Trans. Am. Ent. Soc, May, 1870, p. 67. 



Spirosirephon cavernarum Cope : Am. Nat. VI, 1872, pp 409. 



F. cavernarum Coj)e, Ej^der : Proc. U. S. Nat. Miis. Ill, 1881, pp. 526; Mc- 

 Neill, Bull. No. 3, Brookville Soc. pp. 8 (1888); Bollman, Ibid. XI, 

 1888, pp. 405; Bulletin 46, U. S. N. M., pp. 106. 



Bod}^ somewhat fusiform, broadest anteriorly at about the fifth or sixth 

 segment, naiTOwed abruptly cei)halad, and graduallj^ caudad to the last two or 

 three segments, which are narrowed verj^ abruptly. Carinee moderate, situated 

 above the middle line of side. 



Clypeus near the middle with two well-pronounced depressions about the 

 size of the antennal sockets ; below are two smaller depressions subconfluent 

 ■with the others. 



Eyes more or less triangular in form, sometimes elongate or lunate, ocelli 

 varying from 13 to 17, usually 15 or 16, without regularity of arrangement. 



Antennte filiform, 4-4.5 mm. long, .18-.22 mm. thick, moderately pilose, 

 approximate ratio of lengths of joints to each other, beginning with the sev- 

 enth, 2:3:8: 6:10:4:1: 



Mentum subrectangular, twice as broad as long, the anterior and lateral mar- 

 gins convex, the posterior concave. 



Promentum without hairs, triangular, broader than long (8:5), sides nearly 

 straight, posterior corners not reaching the stipes. 



Stipes with base of inner process more than half the length of outer j)rocess ; 

 lateral edge of outer process with cones nearly to base. 



Lingual lobes subequal to lingual laminte, with five sense-cones. 



Middle lobe nearly square in front, twice as broad as long, subequal to 

 lingual laminae. 



Styliform process deeply trilobed. 



First segment anteriorly nearly semicircular, slightly concave behind,, 

 medianly broadly emarginate. Anterior margin elevated, as well as the 

 posterior along the emargination. Surface smooth ; a fine furrow on each side- 

 o| a median ridge, beginning about the middle of the segment and extending 

 to the posterior margin. On each side three setigerous tubercles, one situated 

 near the longitudinal middle of the segment near the median line, a second 

 close to the lateral angle, the third on the posterior edge of the corner. Tlie 

 lateral bristles measure .2 mm. in length. 



Subsequent segments with the posterior subsegment coarsely tuberculate on 

 its dorsal portion; laterally and veutrally with about 12 longitudinal stria- 

 tions; the superior striation is the largest, being on the portion of the segment 

 laterally most prominent, and is directed obliquely, the posterior end lower 

 down. On the sujierior edge of the posterior end of the carina is a slight pro- 

 tuberance bearing a short, clavate bristle; on the anterior edge of the elevated 

 portion of the posterior subsegment are two similar slight protuberances the 

 outer of which bears a similar clavate bristle. On the anterior segments the 

 surface of the median portion of the posterior subsegments is smooth, the 



