various Central American Coleoptera. 119 
four slender joints only between the two stout basal ones 
and the club, the tarsi relatively less elongate. The 
antennae have been examined in three examples and 
nine joints only can be counted, the two missing joints 
being doubtless fused into the elongate third. 
MICROPSEPHODES, n. gen. 
Head retractile, broad, abruptly narrowed before the large, 
prominent eyes; labrum small, exposed; last joint of the maxillary 
palpi (fig. 36) oblong-ovate, obliquely truncated at the tip; an- 
tennae (fig. 3a) moderately long, inserted under the sides of the 
front, 7-jointed, 1 and 2 stout, 3 and 4 slender, 5-7 widened into 
a very large, loosely-articulated, serrate club; prothorax finely 
margined laterally, bisinuate at the base and apex, the median basal 
lobe almost covering the scutellum; elytra very convex, closely 
embracing the prothorax; legs moderately elongate; tibiae narrow ; 
tarsi (fig. 3c) very slender, long, 3-jointed, the first joint extending 
beneath the second to near its apex and clothed with some long 
hairs, 2 short, 3 nearly as long as 1 and 2 united, the claws slender ; 
body globose, glabrous. 
Type, M. serraticorms. 
This minute insect seems to be nearly related to Micro- 
psephus, from which it differs in its 3-jointed tarsi, the 
larger eyes, and the very peculiarly formed antennae, 
suggestive of that of a Dorcatoma. The unique example 
found is in such fragile condition that it cannot be safely 
taken off the card again for the examination of the under 
surface. The intermediate and posterior coxae are doubt- 
less widely separated, as in Mucropsephus. The very 
slender antennal joints between the thickened basal ones 
and the broad loose serrate club are so closely articulated 
that it is not easy to make out their exact number, and 
it is possible one more joint may be present. 
* Micropsephodes serraticornis, n. sp. (Plate IV, figs. 3, 3a-c.) 
Rotundate, very convex, shining ; black with an aeneous reflection, 
the antennae with the club piceous and the other joints flavo- 
testaceous, the first slightly infuscate, the palpi, femora, and tibiae 
piceous, the tarsi fusco-testaceous ; the entire upper surface sparsely, 
minutely, confusedly punctate. Antennae with joint 1 curved, 
stout, elongate, clavate, 2 much shorter, obconic, 3 and 4 extremely 
