and Central American Malachiidae and Melyridae. 121 



$. Head a little smaller; prothorax less rounded at the sides 

 narrowed from near the base, distinctly narrower than the elytra. 

 Length 2ro— 2| mm. 



Hah. Panama, Pena Blanca, above Tole. 



Found in plenty on flowers, on the savannas, in January, 

 1883. Smaller and much less robust than the Guatemalan 

 L. punctatulus, the puncturing of the elytra not nearly so 

 coarse, the marginal ciha longer and more conspicuous, 

 the sexual difEerences less marked. Abraded examples 

 appear to be more shining than those with the fine vestiture 

 intact. The colour varies from brassy to green. The 

 Guatemalan L. versicolor, Gorh., is an alhed larger form, 

 with much broader elytra in the female, etc. 



11. Listrus aeneus. 



Listrus aeneus, Gorh., Biol. Centr.-Am., Coleopt. iii, 2, 

 p. 125. 



The type of this insect, labelled by the author, is a female 

 from Panima, Guatemala ; the second example, from 

 Oaxaca, Mexico, was retained by him, and we may be 

 permitted to doubt whether it really belonged to the same 

 species. L. aeneus ($) is an elongate-oval, bright brassy 

 insect, not unlike the type ($) of L. corallines; but it is 

 larger and longer, with a longer, smoother, subquadrate 

 prothorax, stouter antennae, etc. The fifth antennal joint 

 is triangular, and larger than the sixth or eighth, and the 

 ninth and tenth are stout and transverse. 



12. Listrus corallipes. 



Listrus corallipes, Gorh., Biol. Centr.-Am., Coleopt. iii, 

 2, p. 127 (part.). 



Hab. Guatemala, Vera Paz. 



Two totally different species were placed under this name 

 by Gorham : the type, from Guatemala, is a Listrus ; the 

 other specimen, from Toxpam, Mexico, has a slender fifth 

 tarsal joint, simple, very slender claws, a stout, oblong 

 apical joint to the antennae, etc., and, therefore, belongs 

 elsewhere (cf. under Mecomycter, infra). The type of 

 L. corallipes, from San Joaquin, is smaller than L. punc- 

 tatulus, and has shorter antennafe (which otherwise are 

 similarly formed), a relatively smaller, subcampanulate 

 prothorax, and red antennae (the basal and apical joints 



