194 Coleopterological Notices. 



Legs short. Femora stout, the flanks produced beneath slightly at apex, 

 forming a channel for the i)artial reception of the tibise. Tibice slender, short, 

 cylindrical, truncate, witliout terminal spurs or spinules and devoid of long 

 external setae. Tarsi sliort, slender, cylindrical, densely pubescent, about 

 two-thirds as long as the tibiae, 4-jointed on all the legs ; first joint of the 

 posterior distinctly longer than the next two together and a little longer than 

 the fourth. Ungues small and slender. 



This genus is also somewhat isolated, harmonizing but remotely 

 with any of the more usual forms of the great and composite group 

 to which it is assigned. The extraordinary compressed, almost 

 tape-like antennae, deep flanks of the pronotum and elytra, wiiich 

 extend far below the plane of the lower surface, very short elytra, 

 long conspicuous tactile setae, and four-jointed tarsi, form a combi- 

 nation of characters for which it is difficult to find a fitting place in 

 the series. 



The sexual characters, also, are very singular. In the male the 

 apex of the abdomen is not modified beneath, the sixth segment 

 being evenly rounded behind, but dorsally, the posterior edge of the 

 first segment is strongly emarginate in middle fourth, the bottom 

 of the emargination being transverse. In the female the sixth 

 segment is rounded as in the male, but the basal segment is entire. 



P. DilclleyamiS n. sp. — Piceous ; abdomen slightly paler ; under sur- 

 face, legs and antennae pale brownish-flavate ; surface lustre alutaceous, the 

 pubescence exceedingly short, fine, dense, slightly cinereous and conspicuous, 

 the long tactile setfe very conspicuous, these consisting of six longitudinal 

 series on the pronotum — counting those of the lateral edges — and a transverse 

 series just before the middle of the elytra, the latter being simply the terminal 

 setae of the pronotal series, the setae of the abdomen being a furtlier continu- 

 ation of tlie pronotal series. Head small, only the occiput visible from above, 

 tlie anterior portions of tlie body appearing to be semicircularly rounded, much 

 less than one-half as wide as the base of the prothorax ; antennae about as 

 long as the head and prothorax together. Prothorax nearly one-half wider 

 than long, narrowed from base to apex, subconical ; sides very feebly arcuate. 

 Eli/tra about equal in widtli to tlie prothorax, strongly transverse ; sides 

 parallel and nearly straight ; disk scarcely perceptibly more than one-half as 

 long as the pronotum. Abdomen distinctly longer than the anterior parts 

 combined, conical, acute. Leng h 1.4-1.7 mm. 



Colonil)ia (Panama). 



Taken in considerable abundance by Mr. Beaumont. A good 

 series has been given me by my friend Mr. P. H. Dudley, to whom 

 it gives me great pleasure to dedicate this very interesting species. 



