Xylebcrtis.] RHTNCHOPHORA. 147 



furnished with a very short process ; thorax rough in front and not 

 margined behind ; elytra without an impressed line along suture, with the 

 apex not excavated but slightly reflexed, furnished with more or le .s 

 distinct tubercles, which arc sometimes almost obsolete ; punctured 

 >triae distinct, interstices closely and rather finely punctured in rows ; 

 eves emarginate ; the club of the antennae has the sutures very slightly 

 curved and the funiculus is five-jointed. 



The males are so different from the females that I have folio \vi-l 

 Bedel's arrangement and given a table for each sex ; in the former the 

 elytra are much shorter in proportion to the thorax, and in each case the 

 wings are developed in the females, whereas in the males they are 

 atrophied and obsolete ; this fact probably has a great deal to do with 

 their scarcity in proportion to the females ; it appears to be a somewhat 

 strange reversal of the ordinary rule, (of which we have many examples 

 both among the Lepidoptera and Coleoptera, and, to a certain extent, 

 among the Hymenoptera also), that the female is the sex in which the 

 wings are rudimentary or wanting, 



MALE*. 



I. Thorax rounded, rather flat, elytra globular or sub- 

 globular, convex X. DISPAB, F. 



II. Thorax and elytra oblong. 



i. Upper surface of thorax broadly concave in 

 frout and terminated on its anterior border by a 

 short horn-like projection X. DBYOGBAPHCS, li 



ii. Upper surface of thorax without excavation or pro- 

 jection in front X. SAXESESI, Ealz. 



I. Form broader, oblong; elytra about one an-1 a 



h;ilt' times as long as broad; thorax with the eiJcs 



more or less rounded (Aniscmdrus, Ferr.) X. DISPAB, F. 



II Form narrower, Eubcylindrital ; elytia at least 



twice as long as broad ; thorax with the sides sub- 

 parallel. 



i. Hinder part of thorax distinctly and Bouiewlia". 

 ttrongly punctured, rather shining ; apical 

 declivity of elytra without, or almost without, 

 tubercles X. DBTOGBArHCS, R it:. 



ii. Hinder part of thorax impunctute or almost 

 impunctate, rather dull; apical declivity of 

 elytra with distinct tubercles arranged in longitu- 

 dinal rows , X. SAXESENT, S 



X. dispar, F. (thoracicut, Pauz. ; ? Ratzelurgi, Kol.). Short and 

 broad, clothed with rather long yellowish or greyish-yellow pubescence, 

 shining, black or pitchy-black, with the elytra castaneous or pitchy-red, 

 antennae and legs testaceous, femora and tibise often darker ; thorax 

 scabrous and tuberculate in front, finely pimctured and almost smooth 

 behind ; elytra with regular punctured striae, interstices closely and 



