ATHOUS. 459 



4. Athous aequinoctialis. (Tab. XX. fig. 13, $ .) 



Elongate, rather narrow, moderately shining, finely pubescent ; brown or reddish-brown, the front of the head, 

 the hind angles of the prothorax, and the extreme base of the elytra more or less ferruginous, the legs 

 and antennae testaceous or fusco-testaceous. Head thickly, rather coarsely punctate, depressed in front, 

 the depression sometimes separated in the middle by a longitudinal ridge ; the front prominent, subtruncate 

 at the apex ; the eyes large ; antennae rather slender, extending considerably beyond the humeri in the 

 male, shorter in the female. Prothorax moderately convex, a little longer than broad, gradually narrowing 

 from about the middle forwards, the sides rounded in front and sinuate behind ; the hind angles long, 

 narrow, and divergent, acute and slightly recurved at the tip, rather sharply carinate ; the surface finely 

 and somewhat thickly punctate, the punctuation becoming closer and coarser at the sides, deeply canali- 

 culate down the middle. Elytra nearly three times the length of the prothorax, and of the same width 

 at the base, narrowing from a little below the shoulders in the male, more parallel in front in the female, 

 the apices obliquely truncate, with the outer apical angle rounded ; finely punctate-striate, the interstices 

 moderately convex and sparsely punctate. Beneath, the propleurae included, thickly, finely punctate. 

 Third tarsal joint lamellate, the fourth very small. 



Length 9-10, breadth 2i-2| millim. ( J $ •) 



Hab. Mexico, Jalapa (Hdge) ; Guatemala, San Geronimo and Calderas [Champion). 



A male from San Geronimo and a female from each of the other localities. This 

 insect is allied to A. mexicanus, but it is less depressed ; the thorax has the sides more 

 rounded in front and more sinuate behind (the general shape being subcampanulate), 

 with the hind angles slightly upturned at the tip ; and the elytra are less parallel, 

 narrowing almost from the base in the male, with the apices obtuse. Compared with 

 A. campanulatus it differs in its much smaller size, and in having shorter, distinctly 

 carinate hind angles to the thorax. 



5. Athous marcidus. 



Moderately elongate, narrow, shining, finely and rather sparsely pubescent ; brown, the front of the head, 

 the hind angles of the prothorax, and the extreme base and suture of the elytra paler ; the underside 

 castaneous or reddish-brown ; the antennae fusco-testaceous, with the basal joint testaceous, the legs pale 

 testaceous. Head thickly, somewhat finely punctate, triangularly depressed in front ; the front moderately 

 prominent ; the eyes not very large ; antennae slender, extending to some distance beyond the humeri. 

 Prothorax as long as broad, somewhat obliquely narrowing from the basal third forwards, and sinuate at 

 the sides behind ; the hind angles moderately produced, acute, and divergent, slightly recurved at the tip, 

 and sharply carinate ; the surface very finely and rather sparsely punctate, obsoletely canaliculate behind. 

 Elytra three times the length of the prothorax, and of the same width at the base, narrowing from about 

 the basal third, rounded at the apex ; punctate-striate, the interstices feebly convex and somewhat roughly 

 punctured, granulate at the base. Beneath very sparsely and finely, the ventral segments more closely, 

 punctate, the propleurse smooth in the middle. Third tarsal joint dilated and lamellate, the fourth 

 very small. 



Length 7-7 §, breadth lg millim. 



Hab. Mexico, Oaxaca (Edge). 



Two examples, probably males. Allied to A. wquinoctialis, but smaller and less 

 elongate ; the thorax more conical in shape (it being more narrowed and less rounded 

 at the sides anteriorly), more finely punctured, and indistinctly canaliculate behind ; 

 the under surface much more sparsely punctate, the propleurse smooth in the middle. 



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