238 SEKBICORNIA. 



paler ferruginous, first joint of the hind tarsus distinctly longer than the following joints together, the 

 claw-joint short, claws hroadly toothed at the base. 

 Length 6-8*5 millim. 



Hab. Guatemala, Cerro Zurril (Champion). 



This species is readily known by its elongate form, pale colour, and toothed claws. 

 The last ventral segment of the male has the usual acutely oval form at the apex. 



13. Plesiofornax puellus. 



Oblong, subcylindrical, moderately convex, piceous-brown, subopaque, sparsely clothed with fulvous pubes- 

 cence : antennae ferruginous, half as long as the body and slender ( S ), shorter and subserrate ( § ), the 

 joints having the same proportions as in P. pectoralis ; head convex, densely subrugosely punctate, a short 

 frontal carina, on each side of which is a vague depression, interocular carina not elevated, interrupted 

 by the base of the clypeus, which is narrower than half the distance to the eye ; thorax scarcely wider 

 than long, sides parallel, arcuate at the apical third, disc moderately convex, a short oblique impression 

 at each side of the middle of the base, between these a slight tuberosity, surface very densely punctate, 

 slightly rugose at the sides ; elytra striate, intervals closely submuricately punctate, somewhat transversely 

 wrinkled near the base ; propleurae coarsely and deeply, not densely punctate ; abdomen densely punc- 

 tate ; legs paler ferruginous, first joint of the hind tarsus as long as or slightly longer than the others 

 together, claw-joint rather short, claws broader at the base but not rectangularly toothed. 



Length 5'5-7 millim. 



Hab. Guatemala, Volcan de Atitlan 2500 to 3000 feet (Champion). 



The last ventral segment is obtusely oval at the tip in the male, truncate and broadly 

 emarginate in the female. This insect might readily be mistaken for a Fornax of the 

 adjectus series. 



14. Plesiofornax sublucidus. 



Plesiofornax sublucidus, de Bonv. Mon. p. 464, t. 22. fig. 9 \ 



Hab. Nicaragua (SalM), Chontales (Belt, Janson) ; Panama, Bugaba, Volcan de 

 Chiriqui (Champion). — Guiana, Cayenne 1 ; Amazons, San Paulo 1 , Ega 1 . 



At first glance the facies of this insect is very like that of many Melanoti. It differs 

 from all the preceding species in having the fourth an tennal joint short, scarcely longer 

 than wide, and not longer than the second joint. In the males the antennae are fully 

 half the length of the body, in the females shorter. The male last ventral segment is of 

 the usual oval form at the tip, while in the female the apex is emarginate, but variable 

 in degree. This sexual difference seems to have escaped de Bonvouloir, although the 

 figure by Migneaux faintly indicates it. 



DYSCOLOTAXIA. 



Antennal grooves deep, sharply limited, nearly half as wide as the triangle of the propleurse, distinctly 

 narrowed by the eyes on the head. Antennae slender, extending beyond the hind angles of the thorax ; 

 first joint as long as the next three, second small, partly concealed by the first, third distinctly longer, 

 joints 4-7 nearly equal, broader than long, 8-10 slender, equal, each a little longer than 5-7 together, 

 eleventh slightly longer. Triangle of the propleurae with the outer side distinctly but not greatly longer 



