384 SEEKICOENIA. 



One mutilated example only, without abdomen, has been received of this species ; it 

 is very distinct from any of the other Megapenthes here described, and it seems 

 advisable to name it. In the form of the thorax it approaches the Cuban M. tamiatus, 

 Cand. Much larger, longer, and more shining than M. cinnamomeus ; the thorax 

 more rapidly narrowing from the base, without trace of an outer carina within the hind 

 angles, and less closely punctured, the marginal carina in great part visible from 

 above ; the elytral interstices smoother. The insect cannot be identified with the 

 description of M. athoides. 



14. Megapenthes athoides. 



Megapenthes athoides, Cand. Monogr. Elat. ii. p. 499 \ 



" Fusco-niger, nitidus, breviter fulvo-pubescens ; prothorace a basi sensim angustato, sparsim punctata, postice 

 canaliculate*, margine postica angulisque posticis acutis, carinatis, divaricatis, rufescentibus ; elytris 

 punctato-striatis, interstitiis granulatis, brunneo-testaceis. — Long. 10, lat. 2 millim." 



Eab. Mexico K 



The hind angles of the thorax are stated l to be strongly unicarinate, the thorax 

 itself very gradually narrowing from the base forwards and sparsely punctured; the 

 antennee in the male long and thin. We have not received a Megapenthes answering 

 to this definition. The type is not contained in the collection of the late E. W. Janson 

 nor in that of Dr. Candeze. 



15. Megapenthes fusiformis. (Tab. XVII. figg. 6, 6 ; 6 a, antenna ; 6 b, 

 coxal plate ; 6 <?, genitalia.) 



Moderately elongate, convex, subfusiform, sbining, finely and rather sparsely pubescent ; varying in colour from 

 flavo-rufous to brown or reddish-brown, the head aud prothorax (the hind angles excepted) often iufuscate ; 

 the antennae piceous or brown, with the three basal joints paler ; the legs testaceous ; the under surface 

 piceous or pitchy-red, the prosternum and propleurse rufous or flavo-rufous. Head moderately convex, 

 thickly punctured ; antennae short, extending to a little beyond the hind angles of the prothorax in the 

 male, still shorter in the female, rather slender, joints 2 and 3 very short, equal, 4 longer than 2 and 3 

 united. Prothorax convex, slightly longer than broad, narrowing from the base forwards, the sides 

 rounded anteriorly ; the hind angles acute, divergent, sharply and obliquely unicarinate ; the surface very 

 finely, rather sparsely punctate, with the interspaces smooth and shining, obsoletely canaliculate behind. 

 Elytra moderately long, convex, narrowing from the base, the sides a little rounded, the apices obtuse ; 

 finely punctate-striate, the interstices feebly convex and sparsely, very finely punctate. Beneath sparsely, 

 very finely punctate ; posterior coxal plates moderately broad throughout, becoming slightly wider 

 inwards, but without distinct dilatation opposite the point of insertion of the femora. Legs slender. 



Length 6f-8|, breadth 1 1-2| millim. ( <j ? .) 



Eab. Panama, Volcan de Chiriqui 3000 feet {Champion). 



Numerous examples of both sexes. In £he form of the coxal plates this species differs 

 from all the allied forms, and it should perhaps be treated as generically distinct from 

 Megapenthes. M. fusiformis resembles M. rubigineus, but it is less elongate, more convex, 

 and more fusiform. The third joint of the antenna? is very small, not larger than the second. 



