34 Descriptions of New 



I include in this species individuals with a 2 and others 

 with a 3 -jointed antenna! club. The latter are further distin- 

 guished by having a slight sinuosity in the rounded outline 

 of the basal angles of the thorax, by having the posterior 

 part of the meta thorax and the base of the abdomen sensibly 

 incrassated, and the head rather less quadratic than the 

 former. However, the individuals thus distinguished being 

 in all other respects exactly like those with the 2-jointed 

 club, I cannot help looking upon all these distinctions as 

 sexual ones and uniting the insects in the same species. 



The head from the eyes to the neck is of a transverse sub- 

 quadratic form merging into the oval by the angles being 

 rounded off, the anterior part is narrowed. And this is the 

 typical sculpture of the skull in all the 5 species of this group. 

 The eyes in the present species are middling. The antenna; 

 are rather approximated at the base and inserted in the 

 centre of the front under a ridge which runs across it from 

 eye to eye. The first joint is biacuminated at the apex, 

 the 5th is longer than the adjoining ones, joints 7-9 in the 

 individuals with the 2-jointed and 7-8 in those with the 

 3 -jointed club, are of a peculiar construction, being narrowed 

 at the apex and fitting into each other like the tubes of 

 a spyglass. The club joints are ovate, flat at the base, the 

 last is large and obtusely acuminated. I consider the princi- 

 pal distinguishing character to lie in the remarkable structure 

 of joints 7-9 of the antennae. The maxill. palpi have joint 

 2 rather strongly incrassated at the apex, joint 3 obovate, 

 narrowed at the base, joint 4 very minute, truncated at the 

 apex. The mandibles are furnished with a bifid tooth and 

 are strongly and abruptly dilated at the base, The thorax is 

 of an obovate or obcardato-ovate form, being rather strongly 

 rounded off before the middle and gradually narrowed below 

 it; the usual basal impressions are wanting, the posterior 

 margin has two slight sinuosities, the posterior angles are 



