630 Entomological Papers. [No. 6. 



basalibus huraeros fortissime amplectentibus, apicem versus valde 

 rotundatus, apice leviter sinuatus. Elytra quadrata, abdomen non 

 totum obtegentia. Scutellum parvum. Pedes robusti tibiis apicem 

 versus incrassatis, tarsis art 3 primi secundique longitudine, bis 

 subbilobis subtus penicillatis, coxis posticis simplicibus distantibus. 

 Mesosternum non carinatum. 



TJbi praecedentes sed infrequenter occurrit. 



The g. Ptilium is the repository for all the anomalies of the 

 family, its characteristics therefore are very vague, but if the 

 absence of the mesosternal carina and the simplicity of the poste- 

 rior coxae are the determining features amongst them, the present 

 species, in spite of a variety of anomalies it exhibits in other re- 

 spects, belongs to it. The head is of middling size ; the antennae 

 robust with the 1st joint of the club of the shape of an inverted 

 cone, the 2nd rather cylindrical, narrowed at the base and the last 

 elongate, ovate. The thorax is of very different structure from 

 that of the foregoing species of the family the basal angles being 

 produced unusually far beyond the shoulders ; towards the head it 

 is strongly and rapidly rounded off, being thus altogether of a 

 semicircular shape ; at the apex it is merely slightly sinuated, and 

 the head is inserted rather below than in this sinuosity ; the whole 

 thorax moreover is very convex whilst the elytra are depressed. 

 The wings vary from the typical form by being fringed with short 

 simple cilia instead of those long feathery appendages, they are 

 moreover without a distinct peduncle, but still folded in the man- 

 ner characteristic of the family. The legs are stout, with the tibiae 

 thickest at the tip ; the 3rd tarsal joint is of the length of the pre- 

 ceding two, the latter are somewhat bilobed and hairy below. The 

 posterior coxae are simple and distant. The mesosternum without 

 a carina. The whole shape of the insect is quadratic rather than 

 otherwise. 



20. Ptenidium macrocephalum. JV". 



P. ellipticum, subconvexum, nitidum, sparsim pilosum, supra 

 piceo-aeneum, subtus piceum pedibus oreque testaceis. Long. corp. 

 i lin. 



Caput maximum. Antennarum clava elongata articulis ellipti- 



