COLEOPTEUA. PRIONIDiE. 361 



labium; and 43. lo, ii. tarsi of ditto) proves that it is one of the 

 aberrant forms of the family. I liave published figures of the details 

 of this genus in the supplemental plates of the Zool.Journ. tab. 47. f.8. 

 The Cerambyx striatus and rusticus Linn., which have been gene- 

 rally regarded as belonging to the genus Callidium, have been formed 

 by Eschscholtz (^Bull. Soc. Nat. 3Iosc., tom. ii.) into the genus Asemum, 

 and placed in the present family ; differing from Callidium in the 

 structure of the eyes, and approaching Spondylis in the form of the 

 thorax. I have further noticed, upon dissection of Cer. striatus, that 

 the very minute lobes of the maxilla?, and the smallness of the upper 

 lip, which are characteristics of the present family, are also found in 

 that insect. As, however, these two species are also nearly allied 

 to Callidium, it would, perhaps, be most natural to place Spondylis at 

 the end of the Prionidaj, and make Asemum the connecting link 

 with the following (Cerambycidaj), commencing the lattter with 

 Callidium.* 



Amongst the exotic genei-a, the Brazilian genus Parandra (which 

 is not, however, admitted amongst the Longicornes by M. Serville) 

 offers several important characters, differing from all the Longicornes 

 in the very short and transverse labium, with its front margin forming 

 the segment of a circle, and very hirsute: the body is highly polished 

 and smooth ; the antennae short, and submoniliform. (See Zool. Journ. 

 Siippl. pi. 47. fig. 7. for details.) 



The Brazilian genus Anacolus Latr. is also remarkable in having 

 the elytra short and triangular, not entirely covering the wings 

 and abdomen. Mr. Say has described a North American insect, in 

 which the wings are entirely wanting, and the elytra soldered together, 

 under the name of Moneilema, which appears to be nearly allied 

 to the genus recently established by M. Guerin, under the name of 

 Prionapterus; having short elytra, and being, as the name suggests, 

 wingless. The Prionus rostratus, in which the mandibles are very 

 long, but incurved, and the presternum produced into an acute de- 

 flexed spine, has been formed by Mr. Vigors into the genus Dorys- 

 thenes. Another curious Indian species, allied to the foregoing, forms 

 the genus Dittosternus Hope, in which both the pro- and meso-sterna 



* Since this was written, Dr. Ilatzeliurg lias published figures of the various 

 states of Spondylis buprestoides, the larva of which {fig. 43. l.\), in the large size 

 of the head (^fig. 43. 13.)) bears a much greater resemblance to the lA-pturida- than 

 to Prioiuis. {Die Forst- Insecten, Col. pi. xvii. f. 12.) 



