298 SEEKICOKNIA. 



of them belonging to our fauna ; four others from Central America are now added. 

 In A. fusiformis, A. cribricollis, and A. curticollis the sides of the mesosternum are 

 less raised than usual; A.rubidus, Cand., and A. columbicus, Fleut., possess a similar 

 peculiarity. 



Mesosternum with the sides strongly raised, horizontal; frontal carina pro- 

 minent ; antenna; with joints 3 and 4 equal in length ; hind angles of the 

 prothorax rather feebly carinate ; elytra mucronate at the apex. 

 Elytra narrowing from about the middle ; prosternal sutures deeply grooved 



in front ; size large (22-25 millim.) arcuatus. 



Elytra narrowing almost from the base ; prosternal sutures not or very feebly 

 grooved in front. 

 Prothorax convex, moderately transverse, rounded at the sides anteriorly ; 



size 12-15 millim corax. 



Prothorax feebly convex, strongly transverse, subtrapezoidal ; size 9|-11 



millim. . mucronatus. 



Mesosternum with the sides moderately raised, subhorizontal ; frontal carina 

 flexed downwards in the middle; hind angles of the prothorax sharply 

 carinate. 

 Antennge with joint 3 shorter than 4; prothorax finely punctured; elytra 



sharply mucronate at the apex fusiformis. 



Antennae with joints 3 and 4 equal ; prothorax very coarsely punctured ; elytra 



feebly mucronate at the apex cribricollis. 



Mesosternum with the sides sharply, triangularly raised in front ; frontal carina 

 prominent; antennae with joint 3 very little longer than 2; hind angles of 

 the prothorax obliquely carinate ; elytra rounded at the apex curticollis. 



1. Atractosomus arcuatus. 



Atractosomus arcuatus, Cand. Monogr. El at. ii. p. 142, t. 3. figg. 3, 3 a \ 

 Atractodes arcuatus, Cand. Cat. Method. Elat. p. 64 2 . 



Hab. Mexico 1 2 (coll. Janson, ex Mniszech), Cordova (Salle) ; Nicakagua, Chon tales 

 (Belt, E. M. Janson) ; Panama, Bugaba, Volcan de Chiriqui 3000 feet (Champion). 



I have seen six specimens of this species, including two from Mexico, which are both 

 females. The two from Chiriqui are of the male sex, and they have the antennae more 

 elongate. In three of the southern specimens the elytra are coarsely punctate-striate 

 towards the suture. 



2. Atractosomus corax. 



Atractosomus corax, Cand. Monogr. Elat. ii. p. 142 l . 

 Atractodes corax, Cand. Cat. Method. Elat. p. 64 2 . 



Hab. Mexico, Cordova in Vera Cruz, Tanetza (Salle), Jalapa (Edge). 



Yar. The elytra, and sometimes the head and prothorax also, brownish-ferruginous or rufo-piceous. 

 Atractodes gagatinus, Cand., in litt. 



Hab. Mexico, Cordova (SalU), Jalapa (Edge). 



