TRICHALPHUS.—ALPHINELLUS. 153 
TRICHALPHUS. 
Alpho et Leptostylo necnon Ecyro affinis ; differt corpore toto longe hirsuto, thoraceque lateribus haud armato. 
Corpus parvum, oblongum, subcylindricum. Caput parvum, inter antennas valde depressum ; oculi magni, . 
grosse granulati. Antenne filiformes, longe hirsute; scapo ut in Leptostylo elongato sed paullo magis 
clavato, subtus minus flexuoso, apice nihilominus acute producto; articulis 3° et 4° equalibus scapo 
vix longioribus, 5°-11™ gradatim decrescentibus. Thorax vix transversus, dorso obtuse multituberculatus, 
lateribus paulo ante basin obtuse tumidis. Elytra apice rotundata, dorso equaliter convexa, pluricostu- 
lata et seriatim setosa, cristis centro-basalibus plurifasciculatis. Pedes breves ; femora valde clavata ; 
tarsi posteriores breves, articulo primo quam ceteri singuli vix longiore. Acetabula antica extus nullo- 
modo angulata. Pro- et mesosternum inter pedes lata. 
The species for which this new genus is instituted has very little general resemblance 
to the rest of the Acanthocinini, its oblong, subcylindrical form and long pubescence 
being unusual features in this group. The length and form of the antennal scape and 
the perfectly closed exterior suture of the anterior haunch-sockets, however, leave us 
in no doubt as to its position. On account of its short posterior legs and hind tarsi I 
place it near Leptostylus; but it would probably be better ranged in the vicinity of 
Ecyrus and Alphus. 
1. Trichalphus pilosus. 
Rufescenti-fuscus, pilis longis griseis (precipue in pedibus) vestitus, thorace medio lineis, elytrisque plaga magna 
humerali fasciculisque, nigro-fuscis ; antennis pedibusque rufescenti-fusco atro-fuscoque variegatis. 
Long. 4 lin. 
Hab. Guatemata, San Gerénimo (Champion). 
ALPHINELLUS. 
Corpus minutum, oblongum, convexum. Caput inter antennas valde concavum. Antenne filiformes, corpore 
vix longiores, nec ciliate, scapo abbreviato, mox a basi gradatim dilatato, infra leviter flexuoso, apice 
subacuto ; articulo tertio quam scapum duplo longiore, quarto paullo breviore, ceeteribus brevibus. Thorax 
subquadratus, dorso antico valde gibboso, lateribus paullo ante basin acute spinosis vel obtuse prominen- 
tibus. Elytra subcylindrica, postice abrupte declivia, apice juxta suturam brevissime truncata, dorso 
utrinque carinulis tribus lineatim digestis et versus latera bicostulata. Pedes breves; femora clavata ; 
tarsi posteriores articulo primo brevi, triangulari. Prosternum inter pedes angustum, coxis globosis, 
exsertis; acetabula extus clausa. 
Three extremely small species at present constitute this very distinct genus, which 
resembles Leiopus and Lepturges in the form of the prosternum and anterior coxe, but 
differs wholly from them in its convex oblong body, with gibbous thorax and elytra 
marked with short elevated lines arranged in rows. The thoracic lateral spines existing 
in two of the species are similar to those of the genus Dectes; but in a third species, 
very similar to the other two, these spines are absent. The form of the scape is unlike 
that of any other genus of Acanthocinini, approaching nearest that of Alphus. 
1. Alphinellus gibbicollis. 
Atro-fuscus, subtiliter squamoso-tomentosus absque setis pilisque, passim crebre punctatus, thorace lateribus, 
elytris dimidio posteriore humerisque cinereis ; antennis rufescentibus, articulis 3°-11™ apice fuscis ; tibiis 
BIOL. CENT.-AMER., Coleopt., Vol. V., February 1881. Xx 
