124 COLICOI'J'KRA. 



quite piceous; it is iiKire or less detinitrly bisulcate between the antennae, 

 and from that point tlie obtuse median eai-ina l)e('omes sli<rlitly thickei' 

 towards the base. Thorax of e(|iial Imj^th and l)i(';i(]tli, llu' anterior 

 contraction a third of the whole k'ngth, not (|uite strai^lit behiixl, the 

 sides loeing sliglitly trinodose, base and apex tiuiu'atc ; on t!ie iniddle 

 of tlie disc there is a sliort obtuse elevation, and a paii- of oblicpie ones 

 extending from that point towards tlie apex, the enclosed frontal space 

 is Hat, with fine and rather distant yet (piite distinct punctures similar 

 to those behind, the hinder poi'tion also is somewhat uneven. Klytra 

 twice as long as the thorax, their shoulders porrect and lathei' wider 

 than it is at the base, a little broader near the middle, witli sliglitly 

 uneven nodose sides, the posterior declivity not (juite vertical l)ut con- 

 siderably narrowed; disc slightly convex, coarsely subseriate-punctate, 

 not more than 6 punctures in each low, the declivity more finely striate- 

 punctate ; interstices nearly bai'e and smooth; the 3rd, at the base and 

 siuiniiit of the declivity, are nodose; neaiei' tlie sides the nodosities are 

 less distinct; tlie setae aie almost confined to the sutural region and 

 elevated spots. 



Scape vei'v gradually incrassate, with gieyish setae, it is inserted 

 near the apex, but does not (]uite reach the eyes; scrobes visible above 

 near the apex only ; funiculus as long as the scape, basal joint longer 

 than the next, narrowed, towards its l)ase, joints .'5-7 about ecpial, 

 transversely (piadrate; club ovate, its ajiit'al joints, together, only lialf 

 the length of the large basal joint. 



Femora with a very prominent tooth-like ])idcess undei'neath. Tibiae 

 externally arcuate -above the middle, tlie anterior widely medially 

 dilated inwardly, the others less distinctly so, all uncinate. Tarsi with 

 moderately dilated penultimate joints, excavate above but not definitely 

 bilobed. 



l^nderside dull rufo-castaneous, witli some distinct flavescent setae. 

 Presternum deeply emarginate in front, the coxae nearly contiguous, 

 separated by the cariniform margins of their cavities. Intermediate 

 coxae with a flat transverse, bijiunctate interval between them. Meta- 

 .sternum shoi-t, medially flattened, with a sei'ies of moderately coarse 

 punctures across the front and a less distinct series behind. First 

 vental .segment obtusely curved in line with the front of the widely 

 distant posterior coxae; along the inner and hind part of each of these 

 there is a distinctly punctate shallow impression, the rest of the abdomeii 

 is impunctate; the 2nd segment is almost as large as the basal, its 

 frontal suture is well marked and strongly rounded, almo.st prominent, 

 in the middle, but straight at tlie sides. 



The speciflc name is intended to direct attention to thi' abdominal 

 structure. The first portion of the description indicates some of the 

 pi'incipal superficial disparities betwn^en this species and /?. valr/iis, 2551. 

 B. fuscata, 2396, is a very differi-nt insect. 



(J. Length (rostrum exclusive), 3^ mm. ; breadth, nearly 2 mm. 

 Erua. My first specimen was found in January, 1010, amongst 

 dead leaves; the second, now mounted on its back so as to studv the 

 underside cai-efully, in Januaiy, 1911. 



Ohs. — Four specimens belonging to thiee .species were removed from 

 their cards, cleaned and examined underneath, and remounted, in order 

 to ascertain whether leliable sexual characters existed in this curious 

 genus. The work occupied an entire day. The following notes show 

 the result : — 



