298 Memoirs on the Coleoptera 



twice as long, the grooves narrow and extremely shallow, sometimes indicated 

 almost solely by the distinct though not coarse, well separated strial punctures; 

 intervals virtually smooth, almost four times as wide as the stria?; male abdomen 

 almost impunctate except latero-basally and at apex, having medio-basally a 

 rather deep but simple impression; prosternum not spinose. Length 3.1 mm.; 

 width 1.25 mm. Brazil (Constancia), — Clark. One example, communicated 

 by Desbrochers des Loges. 



The only genus at all closely allied to this is Ranceoma, to be 

 subsequently described. 



Iopsidaspis n. gen. 



The body in this genus is still more narrowly and regularly 

 elongate-oval, shining and completely glabrous, the beak rather 

 thick but shining and finely, sparsely punctate, only very feebly 

 compressed at the sides basally, very feebly arcuate, gradually a 

 little more so toward base, and separated from the head by a fine 

 and rather feeble sulcus. Antennae submedial, the shaft somewhat 

 slender, glabrous, with evident bristles, the first joint as long as 

 the next two, the second also notably elongate and as long as the 

 succeeding two, the club moderate, elongate-oval. Prosternum 

 apparently somewhat impressed, the coxae very moderately sepa- 

 rated. Legs slender, glabrous and rather long, the tarsi with the 

 claw-joint entirely normal, wholly different from that of the pre- 

 ceding genus; tibiae long, straight, not arcuate externally toward 

 apex; prothorax not evidently tubulate at apex, the basal margin 

 strongly beaded, the lobe almost wanting. Scutellum free, parallel, 

 a little longer than wide, the elytra finely but abruptly and deeply 

 grooved. The type is as follows: 



Iopsidaspis truncatula n. sp. — Extremely narrow, oval and convex, polished 

 and glabrous throughout and bright brownish-rufous; beak very nearly as long 

 as the head and prothorax, the latter apparently somewhat longer than wide, the 

 sides evenly and feebly converging from base to apex, slightly arcuate for some 

 distance beyond the middle, the truncate apex two-thirds as wide as the base; 

 punctures extremely minute and remote, scarcely differing laterally; elytra fully 

 two-thirds longer than wide, very elongate-subelliptic, narrowly rounded at tip, 

 a sixth wider than the prothorax and somewhat less than two and one-half times 

 as long; grooves very fine, a fifth or sixth as wide as the smooth intervals; male 

 abdomen convex, extremely minutely, remotely punctate throughout, without 

 definite sexual modification, the last two sutures straight, barely at all reflexed at 

 the sides. Length 2.8 mm.; width 0.9 mm. Brazil (Santarem). One specimen. 



This genus is probably allied closely to lops, but is placed here 

 for some taxonomic reasons. 



Ranceoma n. gen. 



Another monotypic genus seems to be necessary for an oval 

 black shining species, not very much unlike Rancea and Pseudorancea 



