422 Prof. J. Wood-Mason on a neio 



with a bluish tinge, coarsely and closely punctured, the inter- 

 spaces rugulose. 



Chthoneis Grayi. 



C. subelongata, nigra, nitida, thorace pedibusque sordide fulris, 

 tibiis apice, tarsis femoribusque anticis dorso nigvo-piceis ; tho- 

 race transverse, lagvi, utrinque fuveolato ; elytris cseruleo-nigris, 

 fortiter et crebre punctatis, iuterspatiis rugulosis. 



Mas thoracis margine antico medio siuuato ; antenuarum articulis 

 duobus ultimis (ultimi apice exeepto) sordide fulvis. 



Foem. thoracis margine antico medio non sinuato, antennarum 

 articuHs tribus ultimis sordide fulvis. 



Long. 3-3i lin. 



Hah. Brazil, Constancia. Collected by Mr. Gray. 



Vertex shining, impunctate, lower portion of front, together 

 with the orbit of the eyes, finely strigose ; encarp^e contiguous, 

 transversely trigonate ; carina narrowly wedged-shaped ; an- 

 tennse much longer than the body in the c? , not quite so long 

 but exceeding the body in length in the ? ; the third j ont 

 shorter than the second, transverse and turbinate in the d ', 

 the second and third joints equal in length in the 5 , the 

 intermediate joints rather less dilated in the latter sex. Thorax 

 more than twice as broad as long ; sides in the S diverging 

 from the base to far beyond the middle, then rounded and 

 converging to the apex, the anterior angles thickened, ob- 

 tuse ; in the ? the sides are less dilated anteriorly and more 

 regularly rounded ; in the d the apical margin is deeply 

 sinuate in its middle third ; in the $ it is regularly concave 

 for its whole length ; disk smooth and shining, impressed 

 on either side with a deep fovea. Elytra sculptured as in 

 C. albicollis. 



[To be continued.] 



XLVII. — Description o/ Didrepanephorus bifalcifer, the Type 

 of a new Genus and Species o/'E,utelida3, remarkable for the 

 huge Sickle-shaped Mandibular Horns of the Males. By 

 J. Wood-Mason, Deputy Superintendent, Indian Museum, 

 Calcutta. 



In a rich collection of insects formed amongst the hill-ranges of 

 the N.E. frontier of India, and recently brought to this country 

 by Mr. A. W. Chennell, of the Topographical Survey, I have 

 detected an insect which introduces us to a perfectly novel 

 feature in the morphology of the Lamellicorn beetles. Every 



