TERETRIOSOMA. 233 
1. Teretriosoma virens. 
Teretrius virens, Mars. Monogr. in Ann. Soc. Ent. Fr. 1856, p. 136, t. 3. fig. 3 am 
Hab. Guatemaua, Yzabal (Sallé1), Chacoj, Zapote, Pantaleon 1700 feet, Paraiso 
(Champion) ; Nicaraeua, Chontales (Janson). 
Eight examples. 7. virens differs from the Texan 7. chalybeum, Horn, in its much 
smaller size, and in having the scape of the antenne clothed with flavous hairs, the 
inferior portion of the pygidium much less concave, and the mesosternal stria inter- 
rupted at the apex. This last-mentioned character is more conspicuous in some 
specimens than in others, being more or less dependent on the existence of one or two 
punctures which, when present, encroach on the margin. 
2. Teretriosoma impressisternum, sp. n. (Tab. VI. fig. 25.) 
Subcylindricum, breve, viridum, metallicum ; supra dense punctatum, subtus ocellato-punctatum et minutissime 
strigoso-rugosum; fronte transversim concava; pronoto stria integra, pone oculos compresso; elytris 
margine antico anguste levi; pygidio infra valide concavo ; prosterno basi inciso, triangulariter impresso ; 
mesosterno stria marginali valide integra, lobo impresso; antennis pedibusque rufis; tibiis anticis 12- 
vel 13-, intermediis 8-, posticis 5-spinosis. Long. 23 millim. 
Hab. Guatemaa, Zapote (Champion). 
One example. The salient characters of this species are in the pro- and mesosternal 
plates. The base of the prosternum has a triangular impression; and the lobe of the 
mesosternum has a similar impression behind the stria, which causes the margin to 
stand out in relief. '. festivum, Lewis, has the prosternum constructed in the same 
way as in 7. impressisternum ; but the former is three times larger than the latter 
species. 
3. Teretriosoma immarginatum, sp. n. (Tab. VII. fig. 1.) 
Subcylindricum, breve, nigro-eneum, nitidum, undique dense punctatum ; fronte transversim concava, in medio 
tuberculata; pronoto stria integra, pone oculos subfoveolato; elytris margine antico anguste brevi ; 
pygidio supra concavo; prosterno haud striato, basi arcuatim inciso; mesosterno immarginato, grosse 
punctato; pedibus obscure brunneis ; tibiis anticis 12- vel 13-,\intermediis 8-, posticis 5-spinosis. Long. 
23 millim. 
Hab. Panama, Bugaba 1000 feet (Champion). 
T. immarginatum is shorter and broader than 7. virens, and may be known from all 
the described species by the large punctuation of the sternal plates, these latter being 
immarginate and without strie. Dr. Horn’s generic character “ mesosternum with entire 
marginal line” only applies to some of the species now known. Unique. 
4, Teretriosoma conigerum, sp.n. (Tab. VII. figg. 2, 2a, 6.) 
Cylindricum, viridum, metallicum, supra sat dense et fortiter punctatum, subtus sparse ocellato-punctatum at 
minutissime strigoso-rugosum ; fronte convexa; pronoto stria integra ; elytris margine antico levi, trans- 
versim impressis ; pygidio in medio acute acuminato, infra valide concavo; prosterno tenue impresso, haud 
BIOL. CENTR.-AMER., Coleopt., Vol. II. Pt. 1, November 1888. 2 H* 
