140 ' Memoirs on the Coleoptera 



club could not be called "pyriform" in any sense. In parellinus, 

 the beak is shorter than in any one of the three mentioned, and the 

 expression relating to the elytra "latitudine vix dimidio longiora," 

 is not in the least applicable. 



Microstegotes n. gen. 



The body in this genus is small, broadly rhomboidal, very smooth 

 and glabrous throughout, the femora rather slender and spiculate 

 beneath, as in all the preceding, the tibiae evenly rounded externally 

 toward base and the anterior coxae separated by fully their own 

 width. The prosternum is peculiar, it being perfectly flat, but 

 with an oblong median part, in which the lustre becomes dull and 

 alutaceous. The very remarkable mandibles have been described 

 under the generic diagnosis. The only species at hand is the 

 following: 



Microstegotes scapulinus n. sp. — Body short, broadly rhombic, smooth and 

 polished, black, the elytra each with a large humeral red spot, extending slightly 

 over half way to the suture, the humeral angle blackish ; beak ( 9 ) slender, 

 smooth and cylindric, four-fifths as long as the body, feebly arcuate, gradually 

 strongly so toward base, minutely and remotely punctulate, a little more strongly, 

 irregularly so at the sides basally, separated from the head by a moderate reen- 

 trant angle; antennae at two-fifths, slender, piceous, the scape very short, coming 

 very far from attaining the eye; basal joint of the funicle much elongated, fully 

 twice as long as the second, the remainder missing in the type; prothorax two- 

 thirds wider than long, the rounded sides not becoming quite parallel basally, 

 the tubulation abrupt and well developed; entire upper surface very smooth 

 and without any form of punctuation; basal lobe broadly rounded, the oblique 

 lateral impressions deep; scutellum short and transverse, transversely canalicu- 

 late; elytra triangular, as wide as long, distinctly wider than the prothorax and 

 two-thirds longer, the oblique sides feebly arcuate, the apex rather strongly 

 rounded; humeri prominent and narrowly rounded; striae extremely fine and 

 feeble, feebly punctulate, coarser and more punctate on the flanks, feebly dilated 

 basally, not attaining the basal edge, coarser and exarate apically; femora 

 strongly and loosely, irregularly punctate; abdomen strongly convex, nearly 

 smooth, the punctulation very minute and sparse. Length 3.4 mm.; width 2.4 

 mm. Brazil (Santarem). One specimen. 



As before stated, it is highly probable that Diastethus humerosus 

 and humeronotatus, of the Central American fauna, also belong to 

 this genus, but it would be necessary to examine the prosternum 

 and mandibles, before any final statement could be made. 



Pseudogarnia n. gen. 



In general habitus, the single species of this genus known thus 

 far departs widely from any of the preceding genera. The body 

 is symmetrically rhombic, the anterior coxae separated by their 

 own width, the prosternum with a moderately deep though rather 



