MICROKHAGUS. 249 



not mention the sex of the specimens he describes ; it is therefore presumable that the 

 males of M. amazonicus do not have pectinate antennae. One male specimen before me 

 from San Isidro agrees with the typical forms above described, except that the thoracic 

 carina is replaced by a short smooth line. It does not seem advisable to separate it. 



4. Microrhagus intrusus. 



Closely related to M.repanclus, differing only in the following details :— Thorax coarsely punctate with distinct 

 smooth intervals between the punctures, at the base without trace of a median carina ; antennae ( J ) 

 pectinate, the branches at least three times longer than the joint, ( $ ) strongly serrate, the joints at the 

 apex wider than long. 



Length 3 millim. 



Hab. Guatemala, Chacoj {Champion); Panama, Bugaba (Champion). 



5. Microrhagus frsenatus. (Tab. X. fig. 22, <$ .) 



Cylindrical, moderately convex, narrowed posteriorly, feebly shining ; head reddish, thorax dark brown, elytra 

 piceous-black ; surface pubescent, that of the thorax yellowish-cinereous, darker along either side of the 

 middle, that of the elytra dark on the disc, cinereous along the side margin : antennae piceous, longer than 

 half the body, slightly serrate ; head convex, closely subrugosely punctate, not carinate or impressed, clypeus 

 narrower at the base than half the distance to the eyes, these triangularly excised in front; thorax 

 quadrate, very little wider than long, sides straight and parallel, arcuate at the front angles only, disc 

 convex, depressed in the region of the hind angles, a punctiform impression each side of the middle of the 

 base, between these an obtuse elevation, surface densely but not coarsely rugosely punctate ; elytra very 

 vaguely striate, the intervals subgranulately punctate, rugose at the base ; propleural groove much broader 

 behind, its outer carina entire, the posterior inferior carina extending two-thirds to the apex ; body 

 beneath piceous ; abdomen densely, moderately coarsely punctate ; legs entirely piceous. 



Length 3 millim. 



Hab. Guatemala, Zapote (Champion). 



An easily known species by its colour above and by the trivittate arrangement of 

 the pubescence on the thorax. There does not seem to be any described species 

 particularly related to it. The unique male has a small tubercle at the middle of the 

 last ventral segment. 



6. Microrhagus ruficeps. 



Cylindrical, narrower posteriorly, moderately convex, piceous-brown, shining, sparsely clothed with short 

 fulvous pubescence, antennae, head, apex of the thorax, apex and often the suture of the elytra, and legs 

 rufescent : antennae as long as ( $ ) or a little longer than ( <f ) half the body, not strongly serrate ; head 

 convex, not carinate or impressed, moderately closely punctate, but with distinct intervals, clypeus as 

 broad at the base as the distance to the eyes, these distinctly incised in front ; thorax scarcely wider 

 than long, quadrate, sides straight and parallel, slightly rounded at the apex only, disc moderately convex, 

 a very vague oblique impression each side of the middle of the base, surface moderately, not closely punc- 

 tate, a vague groove along the apical border externally ; elytra extremely indistinctly substriate, sutural 

 stria short, intervals more finely punctate than the thorax, and gradually more sparsely to the apex ; 

 propleural groove distinctly wider behind, its outer carina entire, the posterior supplementary carina 

 extending halfway to the apex ; body beneath reddish-brown, abdomen closely punctate ; legs paler. 



Length 2-3-5 millim. 



Hab. Guatemala, San Isidro (Champion) ; Panama, Bugaba, Volcan de Chiriqui, 

 Caldera (Champion). 



biol. cente.-amee., Coleopt., Vol. III. Pt. 1, November 1890. 2 K 



