562 Mr. T. Vernon Wollaston on the 



conspicuously biflexuose) have their apical cavities, for 

 the reception of the tarsi, unusually large and open ; and 

 the latter (as in most of these immediately-allied forms) 

 are remarkably short and incrassated, with the third joint 

 deeply bilobed, and the ultimate one abbreviated and 

 conical. The prothorax and elytra are very distinctly 

 margined at their respective bases (the latter of them 

 likewise at the apex) ; and, as in the neighbouring groups, 

 the antennae are thick, with the second funiculus-joint 

 much reduced in length, and the club narrow and acumi- 

 nated. 



75. PSEUDOCOSSONUS (Wollaston, Trans. Ent. Soc. 

 Lond. 27. 1873). The genus Pseudocossonus was 

 founded by myself a short time ago to receive two insects 

 which were captured by Mr. GT. Lewis in Japan ; and a 

 third exponent is now before me, from the collection of 

 Mr. Pascoe, which was obtained by Mr. Wallace at Dorey 

 in New Guinea. There can be no doubt, I think, that 

 its affinities are with such forms as Catolethrus and Phace- 

 g aster, from America ; though still more so with Exonotus, 

 from the Malayan archipelago, and the Indian Catolethro- 

 morphus with which it agrees in its rostrum being more 

 parallel, and not divided from the forehead by a basal line, 

 as well as in the fact of its eyes being rounder, more promi- 

 nent, and more widely separated, in its prothorax being 

 perfectly even (or free alike from keel and depression), in 

 its elytra being entire at their extreme apex, and in its four 

 posterior coxae (instead of the four anterior ones) being 

 equidistant. As in most of the allied groups, the tibiae of 

 Pseudocossonus are furnished at their inner angle with a 

 rather robust spinule ; and the feet are abbreviated and 

 thick, with the third joint bilobed, the terminal one very 

 short and conical, and the claws exceedingly minute. 

 Indeed this shortness of the tarsi is even still more ex- 

 pressed in Pseudocossonus than it is in any of the genera 

 to which I have above alluded, the basal and ultimate 

 articulations being greatly reduced in length. Its body is 

 shining, nearly parallel, and slightly depressed ; and the 

 sculpture anteriorly and underneath is somewhat fine. 

 Although usually dark, its elytra (which do not appear 

 to be margined at their extreme base, or at their apex) 

 are occasionally rufo-castaneous, especially in front, a 

 peculiarity of coloration which is equally indicated in 

 Exonotus. 



