and Central American Telephorinae. 101 



Head closely, minutely punctate ; eyes moderately large ; antennae 

 long and slender (joints 8-11 missing). Prothorax transverse, bi- 

 callose on the disc posteriorly ; the margins narrowly reflexed, dilated 

 laterally into two very long, prominent, convergent teeth, the one 

 in front of the deep median excision narrow, obliquely curved out- 

 wards, the other broader, flattened and lobiform, curved forwards, 

 obliquely truncate at the tip, and armed with a small tooth on its 

 anterior edge towards the base ; the reflexed basal margin dilated 

 laterally into a sharp tooth; the surface sparsely, very minutely 

 punctate. Elytra long, parallel, wider than the prothorax, sparsely, 

 finely punctate. Inner claw of anterior tarsi, and outer claw of 

 the other tarsi, with a dentiform lobe at the base. 

 Length (excl. head) 7^, breadth 2^ mm. 



Hab. Mexico, Omilteme in Guerrero, 8000 ft. {H. H. 

 Smith). 



One male, wholly unlike any of the Mexican forms 

 described by Gorham. S. longidens is of about the size 

 and shape of the insect here described under the name of 

 Discodon mela7iopterwn, from the same locality; but it 

 could not possibly be the male of that species, which is 

 known from females only, these latter having much more 

 densely sculptured elytra. The two convergent lateral 

 teeth of the prothorax are very long and prominent, and 

 separated by a deep incision, much as in the European 

 S. nitidula, F. 



2. Silis laticoUis. (Plate VIII, fig. 65, prothorax, ^.) 



Silis laticoUis, Gorh., Biol. Centr.-Am., Coleopt. iii, 2, p. 97, 

 pi. 6, fig. 17 (cJ). 



Hab. Mexico, Jacale [ ? = Jacala in Hidalgo]. 



Two males of this remarkable Silis are contained in the 

 " Biologia " collection. It is a broad, robust, shining, 

 cinereo-pubescent, black insect, with the apex of the 

 abdomen and the base of the mandibles testaceous. The 

 prothorax is much broader than the elytra, and has the 

 two long, convergent, lateral, post-median lobes separated 

 by a very deep oblique excision. The elytra are parallel, 

 short (not covering the abdomen), and coarsely punctured. 

 The legs and antennae are rather stout, the latter closely 

 pilose. The inner claw of the anterior tarsi is strongly 

 lobed, and the outer claw of the other tarsi angularly dilated, 

 at the base. Schaeffer has described an allied form, S. 

 nigerrima, from Arizona. 



