ISCHIODONTUS. 325 



ally declivous ; anterior process of the metasternum declivous in front; posterior coxal plates strongly 

 triangularly dilated opposite the point of insertion of the femora. 

 Length 14|, breadth 3| millim. ( $ .) 



Hab. Guatemala, San Geronimo in Vera Paz [Champion). 



One female specimen. This insect, at first sight, would appear to be a colour-variety 

 of /. erythroderus, Cand. ; but it differs from that species in having the sides of the 

 mesosternum very gradually declivous, and not raised behind, and the anterior process 

 of the metasternum less convex and more declivous in front. It is perhaps nearest 

 allied to /. nigricornis, but may be known from it by its infuscate legs. 



17. Ischiodontus sus. 



Ischiodontus sus, Cand. Monogr. Elat. ii. p. 114, t. 2. figg. 9, 9 a ( ? ) \ 



Hab. Mexico 1 , Puebla, Cordova (Salle), Mescala in Guerrero (H. II. Smith), Chil- 

 pancingo, Jalapa (Hoge). 



Var. a. The punctures of the elytral striae very coarse and deep ; the interstices smoother and more 

 convex. ( d •) 



Hab. Mexico, Tres Marias Is. (Forrer). 



Var. (3. The punctures of the elytral striae fine, the strise themselves very sharply defined ; the interstices 

 smoother, almost fiat, rather sparsely punctate ; length 13|-14| millim. ( $ .) 



Hab. Mexico (coll. Janson, ex Candeze), Pinos Altos in Chihuahua (Buchan-Hepburn), 

 Guanajuato (Salle). 



This species has the punctures of the head and thorax very coarse, close, and 

 umbilicate, the elytral strise sharply defined, and the interstices roughly punctured 

 towards the base. The males are less elongate and more convex than in the closely 

 allied I. rufulus. I have seen nine examples of the typical form, and three of each of 

 the varieties. In some specimens the thorax has a smooth narrow space down the 

 middle, which is deeply impressed at the base. 



j 8. Ischiodontus rufulus. 



AnopliscMus rufulus, Cand. Monogr. Elat. ii. p. 58 \ 



Hab. Mexico, Orizaba (coll. Chevrolat 1 ), Jalapa (Hoge), Guanajuato, Yolos (Salle) ; 

 Guatemala (Salle). 



The type of this species, a female, has been kindly communicated by M. Fleutiaux. 

 We have received a long series of it from Jalapa, and also numerous specimens from 

 other localities. The males have very elongate antennas. The punctures on the head 

 and thorax are coarse and umbilicate. The insect is larger and much more elongate 

 than the allied /. angustipennis. A male from Jalapa is figured. 



