Classijicaiion of the ColeoiAcrous Janiily Endoinijchidde. 79 



pronotuin has the lateral margins thickened and the base 

 strongly lobed in the middle, with a marginal stria follow- 

 ing its outUne. This stiia terminates at the basal impres- 

 sions on each side, which have undergone a very curious 

 modification, the two sulci meeting in the middle and 

 forming a continuous fine stria more or less semicircular 

 in shape. This, with the structure of the antennae, will 

 lead to the easy identification of the genus. 



T. (" Exysma ") tenuicornis Gorh., was described from a 

 single specimen from Guatemala. The British Museum 

 collection contains also two specimens from Panama and 

 one from Nicaragua (collected by Janson at Chontales) 

 which I believe to be the female — indicating that both 

 Gorham's species are based on characters of the male sex 

 only. In the female the antennae are considerably less 

 attenuated than in the male. The latter has joints 3 to 

 7 of extreme fineness, and the last three each drawn out 

 at the base into a delicate footstalk by which it is attached, 

 while in the female there are only nine joints, the first two 

 as in the male, the 3rd and 4th short and minute, the 5th 

 and 6th slender and the last three oval . 



The species following is described from a female speci- 

 men agreeing in all essentials with that of T. tenuicornis, 

 but with rather less slender antennae. 



Trichopsephus niger, sp. n. 



Niger, nitidus, totus parce griseo-setosus, capite, anteiinis pedi- 

 busque rufis, antennarum ($) articulis 3° ad 6° fere aeqiialibus 

 elongates, tribus ultiuiis breviter ovalibus. 



Long. 1 mm. 



Hab. British Honduras : Kio Hondo {Blancaneau). 



The two previously described species are red in colour, 

 bnt the present one is shining black, except the head, legs 

 and antennae. It is smaller than T. tenuicornis, but a 

 little larger than T. pimdipennis, and the antennae are 

 rather shorter than in the same sex of that species, joints 

 3 to 6 being of almost equal length and the last three 

 shortly oval. 



MiCROPSEPHELLUS, gen. nov. 



Corpus globosum, glabrum. Pedes graciles; tarsi jfiliformes, 4- 

 articulati. Antemiae 8- vel 9-articulatae, breves, articulis tiibus 



