MEGAPENTHES. 379 



Head convex, thickly and somewhat coarsely punctate j antennae short, in the male about reaching 

 the hind angles of the prothorax, a little shorter in the female, the joints from the third considerably 

 widened in the male, 3 more than twice the length of 2, and slightly longer than 4. Prothorax convex, 

 longer than broad, narrowing from the base forwards, the sides rounded in front ; the hind angles acute, 

 directed a little outwards, bicarinate ; the surface thickly, moderately finely punctate, with the interspaces 

 smooth and shining, canaliculate behind. Elytra elongate, narrowing from a little below the base, 

 separately rounded at the apex ; deeply punctate-striate, the interstices slightly convex and somewhat 

 thickly, finely punctate. Beneath rather sparsely and finely punctured ; posterior coxal plates angularly 

 and moderately widened opposite the point of insertion of the femora, narrowing outwards. 

 Length 7^-10, breadth 2-2| millim. ( J ? •) 



Hah. Nicaeagua, Chontales (Belt) ; Panama, Volcan de Chiriqui (Champion). 



Eight specimens. Allied to M. brasilianus, Cand., but rather narrower ; the elytra 

 more gradually narrowing from the base, the antennas black, the upper surface 

 uniformly ferruginous, the femora and tibiae piceous or black, the prosternum rufous, 

 the under surface more sparsely punctured, the head more convex, &c. The antennae, 

 as in M. brasilianus, are short in both sexes. Dr. Candeze has examined one of the 

 specimens and he informs me that the insect is unknown to him. 



4. Megapenthes cinnamomeus. 



Elongate, rather shining, pubescent ; reddish-brown, the prothorax piceous or brown, with the base and hind 

 angles ferrugineo-testaceous, the antennse and legs, testaceous. Head moderately convex, closely punc- 

 tured ; antenna? ( <$ ) rather slender, nearly half the length of the body, joint 3 short, slightly longer than 

 2, the two together not longer than 4. Prothorax feebly convex, longer than broad, rapidly and obliquely 

 narrowing from the base forwards, a little rounded at the sides in front ; the hind angles long, strongly 

 divergent, acute, finely bicarinate ; the surface thickly punctured. Elytra moderately long, narrowing 

 from about the middle, feebly truncate at the apex, the sutural angle sharp ; punctate-striate, the inter- 

 stices flat or feebly convex, thickly punctured and subgranulate. Beneath thickly punctured ; posterior 

 coxal plates broadly and angularly widened opposite the point of insertion of the femora. 



Length 8|-9, breadth 2-2\ millim. ( 6 .) 



Hob. Guatemala, Sinanja in Vera Paz and Capetillo (Champion). 



Two male examples, differing a little inter se in the strength of the elytral sculpture. 

 This species is closely allied to the Cuban M. opaculus, Cand., from which it may be 

 known by the different form of the antennse (in M. opaculus the third and fourth joints 

 are equal, and the organs themselves in the male are much longer and stouter), the 

 much more finely punctured thorax, the more sparsely punctured elytral interstices, &c. 

 The long antennse in the male, with short third joint, the more divergent hind angles 

 of the thorax, &c, distinguish M. cinnamomeus from M. brasilianus and M. rubigineus. 

 The outer carina of the thorax is very fine, but distinct. 



5. Megapenthes cincticollis. (Tab. XVII. fig. 4, $ .) 



Elongate, narrow, subparallel, rather convex, shining, thickly pubescent ; the head (the labrum excepted) black, 

 the prothorax black, with the base broadly (excepj; at the sides) and the anterior angles flavo-testaceous, 

 the elytra pitchy-brown ; the under surface piceous, the propleurse and prosternum partly testaceous ; the 

 antennse testaceous, the legs flavous. Head convex, sparsely punctate ; antennae ( $ ) short, not extending 

 beyond the hind angles of the prothorax, rather slender, joint 3 a little longer than 2, the two together 



3 C 2 



