and Central American Malachiidae and Melyridae. 123 



$, Head and prothorax a little narrower, the latter less rounded 

 at the sides posteriorly. 



Length lA-2iV mm. (^ o.) 



Hob. Mexico, Orizaba {F. D. Godman and H. H. Smith). 



Two males and one female. An isolated form, recognis- 

 able by its small size, the opaque head and prothorax, the 

 red tibiae and tarsi, the subparallel elytra, etc. It is more 

 elongate than L. pygmaeus and L. metallicus. 



15. Listrus metallicus. 



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

 2, p. 127. 



Hab. Guatemala, Cerro Zmiil, Pacific slope. 



A comparatively short, minute, brassy or golden insect, 

 with fine, scattered yellowish pubescence, and rather 

 coarsely punctate surface, the femora and tibiae more or 

 less infuscate. The fifth antennal joint is, as usual, larger 

 than the sixth, and the ninth and tenth joints are widened 

 and transverse. The types are evidently male and female. 



16. Listrus pygrnaeus. 



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

 2, p. 329. 



Hab. Panama, Pefia Blanca and Tole. 



Smaller than L. metallicus, nigro-violaceous or nigro- 

 aeneous in colour, the puncturing much finer, the pubes- 

 cence very fine, the fifth antennal joint small. The an- 

 tennal joints 6-10 are transverse, 9 and 10 are wider than 

 those preceding, 5 not larger than 6. The legs are de- 

 scribed as rufous, but this is not quite correct, as they are 

 partly or wholly infuscate in the long series before me. 



Dasytellus. 



Dasytellus, Casey, Ann. N. York Acad. Sci. viii, pp. 459, 

 564 (1895). 



The few described species of this genus inhabit the arid 

 regions of the South- Western States of N. America. Listrus 

 impressus, Gorh., belongs to it. They are minute insects 

 related to Listrus, from which they differ in having an 

 impressed submarginal line on each side of the prothorax. 



