38 PSELAPHIDA. 
TRIMIOPSIS. 
Trimiopsis, Reitter, Deutsch. ent. Zeit. xxvi. p. 149 (1882). 
This genus is scarcely sufficiently distinct from Trimium, the character on which it is 
founded—viz. the comparative lengths of the segments of the hind body—being liable 
to considerable variation in Zrimium as well as in Bryazis, Batrisus, and other genera 
of this family. Most of the species have, however, a more Huplectus-like build than 
the species of Trimiwm, and the genus may be retained at present. It is as yet peculiar 
to the New World, where it is probably widely distributed. 
1. Trimiopsis mimula. 
Testacea, minus lata, convexa; capite haud lato, anterius angustato, utrinque sat profunde impresso. 
Long. 1 millim. . 
Hab. GUATEMALA, near the city, Capetillo (Champion). 
Antenne short, the first joint very short, the second large; joints 3-8 similar, each 
small, scarcely transverse, the ninth and tenth very short, transverse ; the terminal joint 
very large, three or four times as broad as the joints preceding it, and quite as long as 
five or six of them united. Head small, elongate, with a moderately deep impression on 
each side. ‘Thorax small, about as broad as the head, longer than wide, much narrowed 
behind, with a deep impression in front of the base. Elytra narrowed at the shoulders ; 
with a deep sutural stria, which is still deeper at the base, and a deep intra-humeral 
depression. First dorsal segment of the hind body scarcely longer than the following 
one. | 
This species is extremely similar to Zrimiuwm concolor, but is readily distinguished by 
the shorter basal segment of the hind body; moreover, it has the head smaller and with 
the impressions smaller and shallower. 
Two examples were met with at Capetillo and one near the city of Guatemala. 
From the absence of any conspicuous marks I conclude they may be all females. 
T. mimula is closely allied to 7. clypeata, Reitter, but is rather larger, and with the 
thorax longer and less constricted behind. | 
2. Trimiopsis minuta. (Tab. I. fig. 20.) 
Brevis, testaceo-castanea ; capite transversim subquadrato, utrinque anterius sat profunde impresso. 
Long. 3 millim. 
Hab. GuatTemata, El Reposo (Champion). 
Antenne very short; the terminal joint very broad, extremely short oval, and only 
slightly acuminate. Head transverse-quadrate, the hind angles very definite, with a 
rather shallow and indefinite fovea on each side in front. Thorax short and broad, but 
narrower than the head, much contracted behind, and with a short transverse impression 
in front of the base. Elytra short and broad, quadrifoveate at the base. 
Eight examples. I do not detect any sexual distinction. 
