216 Mr. F. P. Pascoe on new Genera and 



differs from Syrphetodes in the antenna? not being clavate, the 

 eye partly divided by the antennary orbit, and by the non- 

 approximation of the posterior coxse ; both genera agree with 

 the " Phylacides " of Lacordaire in having the epipleuras of 

 the elytra entire behind. The exact habitat is unknown ; my 

 specimens I owe to the kindness of Major Parry. 



Syrphetodes marginatus. PI. V. fig. 10. 



S. ovalis, fuscescens, squamis silaceis sat dense tectus ; antennis 

 articulo tertio quam secundo duplo longiore ; clava tomentosa ; 

 prothorace inaequato, apice bifido, angulis anticis acute productis, 

 lateribus explanatis ; scutello valde transverso, fusco ; eljtris pro- 

 thorace latioribus, punetis parvis in seriebus irregularibus impres- 

 sis, dorso tuberculis plurimis instructis, marginibus explanatis, 

 transversim sulcato-punctatis ; pedibus albido variatim maculatis. 

 Long. 5 lin. 



Hob. ? 



Stenopotes. 



Caput elongatum, antice protensum, quadratum. Ocidi reniformes, 

 obliqui, grosse granulati. Antennas corpore longiores, articulo 

 basali elongato. Protlwrax capite angustior, latitudine sesqui- 

 longior, lateribus inermis. Elytra elongata, subparallela, leviter 

 costulata, epipleuris distinctis. Pedes tenuati ; femora fusifor- 

 mia ; tibia? rectas. Coxa? anticae subcontiguse. 



The strongly faceted eyes in this genus are an exceptional 

 character in this and in a few others of the forty-eight 

 "groupes" into which Lacordaire has divided his " Section B" 

 of the Cerambycidaj. In other respects Stenopotes differs, in 

 the form of the prothorax, in the presence of epipleurae to the 

 elytra, &c, from both Rhagiomorpha and Irttocosmia, the 

 other two genera of the a groupe." These he differentiates 

 by the one having a tuft of hairs on the third joint of the 

 antennas, which the other has not. At best this is a 

 doubtful character ; one objection to it is, that the tuft 

 very often, apparently, belongs to the insect only in its earlier 

 life*. Rhagiomorpha is at present confined to one species — 

 lepturoides, Boisd. My R. exilts, from its prothorax slightly 



* In the case of Tritocosmia Digglesii (Tr. Ent. Soc. ser. 2, v. p. 58), 

 one of my specimens has the tuft reduced to a small patch at one point 

 of the apex of the joint ; this is what I alluded to in saying that the tuft 

 was " deciduous," an expression which M. Lacordaire has taken to mean 

 a denial of its existence. In the same note (Gen. viii. p. 408) he quotes 

 me as giving " Nouvelle Bretagne" (from which island I have never seen 

 an insect), instead of New South Wales, as the habitat of T. rubea. The 

 antennae of T. paradoxa are remarkable, but do not, in the absence of 

 other characters, justify its generic separation as Lacordaire suggests. 



