io Memoirs on the Coleoptera 



distinct. The dimensions of the specimen serving as the type of 

 dispersa are 8.8 by 3.7 mm. 



Tribe Pantotelini. 



The few known species of Pantoteles Sch., so closely resemble 

 certain Ambatides in external facies, that the genus might very 

 well be included in that tribe were it not for the difference in the 

 antennal scrobes, these being horizontal and not obliquely descend- 

 ing. Even in this respect, however, the isolation of the Pantotelides 

 may not be absolutely demonstrable, for in Cholinambates, defined 

 above, the scrobes are generally very feebly descending, and in 

 leucopleura they are depicted as truly horizontal on the plate in 

 the "Biologia." 



Tribe Cyrionichini. 



This tribe is a natural aggregation of more or less minute species, 

 coming near the Optatini in general organization, such as the 

 contiguous or extremely approximate anterior coxae, absence of 

 prosternal spines in the male, spiculate femora and wholly con- 

 cealed pygidium, but in my opinion cannot be included there, 

 because of the decussate mandibles and certain habital characters, 

 which are more easily perceived on actual study than expressible 

 in language. Laterally prominent and broadly exposed humeri, small 

 prothorax and more parallel form of that part, are among the 

 features contributing to this isolation of the allies of Cyrionyx. 

 There are a number of distinct genera, those now known to me 

 being as follows: 



Claws widely free and well developed, the claw-joint long; anterior coxae very 

 narrowly separated; beak long, slender, nearly straight, cylindric; body 

 larger than usual, oblong-suboval, the prothorax prominent at the sides 

 beyond the middle; elytra with a few spiniform discal tubercles; femoral 

 teeth unusually strong. [Type A. spinosa nov.j Alluria 



Claws free, smaller, very slender; claw-joint moderate, not very slender, anterior 

 coxae contiguous or virtually so 2 



Claws very small and slender, connate at base, the claw-joint very slender; 

 anterior coxae as in the preceding group 4 



2 — Prothorax small, deeply constricted dorsally at apex; antennae inserted at 

 the middle of the beak, the club small and stout, its basal segment much 

 more than half the mass; body more ventricose than in Cyrionyx; vestiture 

 not dense, uneven. [Type P. angusticollis now] Plesianones 



Prothorax not deeply and abruptly constricted dorsally at apex: antennae inserted 

 beyond the middle of the beak 3 



3 — Body very small, narrowly oblong-suboval, convex, the strial intervals flat, 

 not carinulate except on the flanks, the vestiture diversified, the elytra with 

 a few condensations as a rule; prothorax relatively not quite so small as in 

 Plesianones or Omogonia, the elytra narrower; antennal club narrower, its 

 basal segment less than half the mass. [Type C. biplagwta Fst.l Cyrionyx 



