696 STA PHYLINIDA. 
are excessively slight, the penultimate segment being simple, and the terminal segment 
possessing only a slight depression along the middle. Unique. 
5. Apocellus gracilis. 
Gracilior, politus, fusco-rufus, pedibus testaceis; prothorace subquadrato, basin versus angustato; elytris 
quam prothorax paullo angustiore. 
Long. 3 millim. 
Hab. Mexico (Truqui), Guanajuato (Sailé). 
This is a smaller insect than A. cognatus; the male especially is much smaller, with 
feeble sexual characters, the penultimate ventral ring being nearly simple, the terminal 
segment deeply and broadly depressed. 
6. Apocellus barbatus. 
Gracilior, politus, nigricans ; pedibus albidis, femoribus extrorsum fuscis; antennis elongatis, articulo ultimo 
rufescente; prothorace minus quadrato, basin versus angustato. 
Long. 3 millim. 
Hab. Panama, David, Bugaba (Champion). 
This insect is smaller than the smallest examples of A. sphericollis, and has different 
male characters. The thorax is convex and more globose than in A. analis and 
A. cognatus, though strongly narrowed behind. The elytra are rather longer than the 
thorax. The hind body is comparatively slender, and the basal segment is yellowish 
in colour. In the male the penultimate ventral segment is nearly simple, its hind 
margin being, however, slightly incrassate and emarginate in the middle; the terminal 
segment is only feebly impressed, but has a group of very long slender sete on each 
side at the outer hind corner of the depression. Four examples. 
7. Apocellus prestans. 
Gracilis, nigricans, politus; elytris fuscis, marginibus dilutioribus ; antennis rufis, ante apicem fuscescentibus ; 
pedibus flavis; prothorace subgloboso. 
Long. 3 millim. 
Hab. GuaTEMALA, near the city, Zapote (Champion); Panama, Volcan de Chiriqui 
3000 to 4000 feet (Champion). 
Exceedingly similar to some of the smaller varieties of A. sphericollis, but the thorax 
is shorter and distinctly transverse. The male characters are also quite different: the 
hind margin of the penultimate ventral segment is armed with a much larger plate than 
in A. sphericollis; this plate is but little curvate, and projects obliquely backwards ; 
there are lateral wings on the terminal segment, but the wings are not elongate and 
their margins are fringed with long cilie; the basal portion of the terminal segment, 
under the protection of the lamina of the preceding segment, is very deeply impressed, 
and is either minutely sculptured or furnished with a fine pnbescence, I am unable to 
say which. 
