DYSCINETUS. — STENOGRATES. 313 



flexuous in the middle. The ligula differs from that of D. Icevipunctatus in being 

 deeply angulate-emarginate ; and the mandibles differ greatly in being sinuated externally 

 towards the apex, and not broadly rounded as in the typical species of the genus. 



4. Dyscinetus barbatus. 



Scarabceus barbatus, Fabr. Mant. Ins. i. p. 10. no. 91. 

 Melolontha barbata, Fabr. Syst. Eleuth. ii. p. 167 \ 

 Chalepus barbatus, Burm. Handb. der Ent. v. p. 77 2 . 

 Chalepus hydrophiloides, Burm. loc. cit. p. 77 3 . 



Hab. Guatemala {Salle). — South America, Pernambuco to Santa Catarina 3 ; West 

 Indies 1 2 (" India," Fabr.). 



On comparing a large series from many localities in the West Indies and Brazil, I 

 find no difference of any moment among them and suspect that C. hydrophiloides, Burm., 

 is the same species. The sexual characters, both male and female, are the same 

 throughout. 



5. Dyscinetus bidentatus. 



Chalepus bidentatus, Burm. Handb. der Ent. v. p. 81 \ 



Cyclocephala brevis, Perty, Del. Anim. Art. Bras. p. 46, t. 9. fig. 16 ? 



Hab. Mexico, Cordova (Salle), Vera Cruz, Tejeria (Hdge).— South America l , Vene- 

 zuela, Amazons. 



The description of Cyclocephala brevis, Perty, seems to me to apply to this species 

 rather than to I), gagates, to which Burmeister refers it with doubt. 



STENOCRATES. 



Stenocrates, Burmeister, Handb. der Ent. v. p. 83 (1847). 



Six species of this genus are known, all tropical American. Besides the simple 

 anterior tarsal claws of the males, the excessively compressed hinder tibiae distinguish 

 the genus from Dyscinetus. 



1. Stenocrates laborator. 



Geotrupes laborator, Fabr. Ent. Syst. i. p. 33 \ 

 Scarabaus laborator, Oliv. Ent. i. 3, p. 53, t. 14. fig. 132. 

 Stenocrates laborator, Burm. Handb. der Ent. v. p. 85 2 . 

 Hab. Mexico, Tuxtla (Salle).— South America, to South Brazil 1 2 . 



A single example in the Salle collection is all that I have seen from our region of 

 this common South-American species. It differs from the southern form in the 

 margin of the frontal suture being somewhat raised on each side and in the fewer 

 punctures of the thorax. 



biol. centr.-amer., Coleopt., Vol. II. Pt. 2, December 1888. 2 SS 



