Mr. West wood on the Sexes in certain Lucanidae. 121 



indebted to two drawings in Buchanan's collection, which are 

 marked " Stolephorus ;'* but the Stolephore {Engraulis, Cuv.) 

 or Anchovies belong to the Clupeidce, a. family remarkable 

 for its narrow or compressed forms. The two figures referred 

 to are not compressed nor sharp beneath, so that they could 

 not belong to the genus Buchanan had in view when he named 

 them on the drawings ; and this mistake he seems afterwards 

 to have corrected, as the same two species appear unquestion- 

 ably to be those described in the ( Gangetic Fishes/ p. 347-8, 

 under the names of Cyprinus Sucatio and Cyp. Balitora*, 



The muzzle of these species is remarkably flattened and 

 thin, but there is nothing remarkable about the pectoral fins ; 

 and the eyes, instead of being placed on the upper surface of 

 the head, as in Platycara, are situated on its edges ; the mouth 

 is remarkably small, placed far behind the long and thin 

 muzzle, without any appearance of cirri, as in the Loaches, to 

 which Buchanan supposed them to bear a resemblance. This 

 genus, which appears to be the suctorial type, I propose to 

 name Psilorhynchusf. The peculiarities just noticed, as well 

 as the position of the eyes, which are far back in the head, as 

 we see in the Moles, Ant-eaters, and other analogous types 

 among quadrupeds, together with their well-formed and fully- 

 developed fins, are indicative of pow T ers of rapid motion, such 

 as distinguishes the Humming-birds, Cinnyris, Waders, and 

 other suctorial types in the same class. Unfortunately we are 

 not acquainted with the habits of the two interesting species 

 under consideration, further than that they were obtained by 

 Buchanan in the northern parts of Bengal, to w T hich they have 

 been probably swept from the mountains. The information 

 to be derived from their intestines is however of the less im- 

 portance as affecting their type, as they w r ould be equally suc- 

 torial whether they derived their food from the juices of plants 

 or from shell-fish or ova. 



[To be continued.] 



XV. — Notice of a hitherto undescribed character distinctive 

 of the Sexes in certain Lucanidae. By J. O. Westwood, 

 F.L.S. 



During the late visit of Professor Burmeister to London, he 

 mentioned to me, whilst looking over my collection of ento- 

 mological drawings, that a Brazilian insect therein represented, 



* It was probably Buchanan's descriptions of these species Mr. Gray had 

 in view when he bestowed the name Balitora on the genus which I now call 

 Platycara. 



t From psilo, thin or attenuated, and rhynchus, a snout or beak. 



