150 Mr. H. W. Bates on the Longicorn Coleoptera 



Genus iEGOMORPHUS. 

 Thomson, Class, des Ceramb. p. 336. 



Char, emend. Body narrow, thick, and somewhat convex. 

 Head as in Oreodera, the muzzle being very slightly prolonged 

 beyond the lower margin of the eyes, its anterior angles obtuse : 

 the eyes distant on the vertex. Antennse rather shorter ; the 

 proportions of the joints the same; but they are not fringed 

 beneath, as in Oreodera. Sides of thorax furuished with a large 

 conical tubercle. Presternum behind and mesosternum in front 

 steeply inclined ; clothed with long hairs in the 6 (at least in A£. 

 moniliferus) . Anterior acetabula angulated. Second and third 

 ventral segments contracted in the middle in the ? ; the fifth 

 very large, its apex truncate-emarginate and densely hairy. Tarsi 

 broad, claw-joint long ; fore tarsi neither dilated nor fringed in 

 the 6. 



The name of this genus first appears in Dejean's Catalogue, 

 but it was first characterized by M. Thomson in the present 

 year; the characters given, however, although numerous, omit 

 the chief peculiarities of the group. The. thickness and con- 

 vexity of the body, nakedness of fore tarsi in the male, and shape 

 of the sterna are the chief points of distinction. M. Thomson 

 places it in the group Trypanidiitse, — an arrangement quite 

 unintelligible on his system, as it does not agree at all with the 

 characters of the section to which the Trypanidiitse belong. 



1. AZgomorphus obesus, n. sp. 



JE". elongatus, convexus, crassus, nigro-brunneus, tomento griseo tes- 

 sellato vestitus : thorace nigro bivittato : elytris apicem versus at- 

 tenuatis, sinuato-truncatis, angulis externis productis. Long. 1 1 

 lin. $ . 



Head clothed with a fine grey pile, leaving three narrow longi- 

 tudinal lines on the vertex brownish black. Antennse shorter than 

 the body, grey ; tips of the joints (from the third) dusky. Thorax 

 with the lateral tubercles conical acute, and with two large slightly- 

 raised dorsal tubercles ; the fore and hind margins and sides punc- 

 tured ; clothed with grey pile ; the dorsal tubercles and a stripe 

 from each to the hind margin black, or thinly clothed with 

 brownish-black pile. Elytra each with three or four slightly ele- 

 vated longitudinal ridges, disappearing at about half the length ; 

 a row of granulations (accompanied by punctures) on each ridge, 

 besides three or four other rows in the interstices ; the sides 

 near the base also densely granulate-punctate : the fine hoary- 

 grey pile is in large patches near the base ; elsewhere it forms 

 regular rows of small, distinct, oblong spots. Under-surface of 

 the body clothed with dense silky yellowish-grey pile, longest 

 on the pro- and mesosterna. Legs clothed with grey pile, 



