Brazilian Baring 105 



Mandibles peculiar and highly specialized, constricted subbasally, concave dis- 

 tally, widely separated and apparently moving in subvertical planes as in 

 Balaninus, the beak extremely long, arcuate and slender 66 



25 — Beak very thick, cylindric and feebly arcuate; antennal club moderate, oval, 

 gradually pointed and with distinct sutures; anterior coxae rather narrowly 

 separated; femora slender, not at all impressed beneath but minutely spicu- 

 late; body stout, very convex, glabrous and shining, with partially metallic 

 lustre. [Type N. illustris nov.] Neplaxa 



Beak more or less slender, of the usual form in the tribe 26 



26 — Prothorax abruptly and conspicuously tubulate at apex; beak separated by 

 a rather deep and sharply marked transverse sulcus; femora not spiculate 

 beneath 27 



Prothorax not or only gradually tubulate at apex; femora never spiculate. . . .29 



27 — Body larger and more convex, glabrous or with scanty vestiture, the elytra 

 with or without sparsely scattered setiform squamules; anterior thoracic 

 stricture marked by strong sculpture; prosternum with or without short 

 spines in the male, the coxae narrowly separated. [Type V. dispersus nov.] 



Vallius 



Body very small in size, less convex and more elongate, wholly glabrous; femora 

 still more slender; thoracic stricture smooth 28 



28 — Upper surface notably flattened, the elytra with very coarse deep grooves; 

 beak a little shorter and stouter. [Type C. subplanata nov.] Crostis 



Upper surface not flattened; form still more elongate, the elytra with abrupt 

 but less coarse grooves; beak longer, more slender and more arcuate. [Type 

 C. tenuipes nov.] Crostidia 



29 — Pronotum without trace of median tumid or cariniform line 30 



Pronotum with the median line cariniform or feebly and obtusely embossed.. .33 



30 — Anterior coxae narrowly separated; body rather large in size, glabrous, but 

 with abruptly limited areas of dense scales beneath and a single small one 

 on each elytron behind the centre; prosternum unimpressed and not spinose 

 in the male. [Type Baris auritarsis Germ.] Megavallius 



Anterior coxae widely separated 31 



31— Prosternum broad and nearly flat, not definitely modified anteriorly (9), 

 or with two long ante-coxal spines and a large deep fossa (o 71 ); anterior 

 coxae separated by about one-half more than their width ; beak very moderate 

 in length, arcuate and notably thick; body glabrous, the elytra with a 

 short posterior discal, and a subscutellar, streak of pale squamules; scutellum 

 quadrate. [Type D. oblongula nov.] Dealia 



Prosternum before the coxae with a wide and very shallow canal, the coxae less 

 remote; prosternum apparently not spinose in the male; body smaller, more 

 abbreviated and ovoidal, subglabrous throughout; scutellum smaller. [Type 

 S. asphaltina nov.] Stethobaropsis 



Prosternum with a small deep foveiform fossa near the anterior margin; beak 

 longer, arcuate 32 



32 — Body suboval, almost glabrous, the thoracic apex briefly and feebly sub- 

 tubulate; scutellum very small; antennal club gradually formed; proster- 

 num bispinose in the male. [Type D. gradata nov.] Dialomia 



Body more elongate, suboval, with more pronounced subapical prominences on 

 the elytra and not so glabrous; thoracic apex more tubulate, the tubulation 

 very pronounced, though gradually formed; antennal club larger, abrupt 

 and with coarser sutures, the female alone known at present. [Type E. 

 longula nov.] Eudialomia 



33 — Body narrowly elongate-suboval, densely sculptured throughout and sparsely 

 squamulose; beak thin; antennal club slender; prosternum strongly bi- 

 spinose in the male and with a very deep circular pit. [Type L. densus nov.] 



Leptoladustes 



