174 PHTTOPHAGA. 



only Central-American species before me to Chapuis's type, although with some doubt, 

 as only a short diagnosis is given by that author.- 



l. Tymnes verticalis. (Tab. IX. fig. 19.) 



Tymnes verticalis, Chap. Gen. des Coleopt. x. p. 311, note 1 \ 

 Eab. North America 1 .— Mexico, Playa Vicente, Jalapa {Edge). 

 The three specimens obtained by Herr Hoge, of which one from Jalapa is figured 

 here, show some variation in shape and punctuation, which may be attributed to sexual 

 differences. In one of them the underside is piceous, while the femora and upper 

 parts are of a dark aeneous colour ; antennae, tibiae, and tarsi are fulvous ; the head is 

 closely and strongly punctured, with an elevated short ridge at each side near the base ; 

 the thorax is of transverse shape with rounded sides, the anterior angles being much 

 deflexed and acutely pointed, the surface is punctured like the head, but less closely ; 

 the elytra are geminate punctate-striate near the suture, irregularly punctured at the 

 sides ; in the other specimens the thorax is less transverse, the elytra less distinctly 

 geminate punctate, and the underside and legs are dark fulvous. 



MYOCHROUS. 



Myochrous, Erichs. Archiv f. Naturg. 1847, i. p. 164. 



About a dozen species from North and South America constitute the genus 

 Myochrous, which may be known by the scale-like pubescence covering the upper 

 surface, and by the dentate lateral margin of the thorax in connexion with the convex 

 anterior margin of the thoracic episternum. One species only, up to the present time, 

 has been described from Mexico. 



1. Myochrous sallsei. (Tab. VII. fig. 19.) 



Myochrous sallati, Baly, Trans. Ent. Soc. 1865, ser. 3, p. 335 \ 

 Eab. Mexico \ Oaxaca, Playa Vicente (SalU). 



This is a species of narrow and elongate shape, covered above with very fine and 

 closely arranged greyish-white pubescence, the legs and antennae being of a fulvous 

 colour. 



A specimen from Playa Vicente is figured. 



2. Myochrous melancholicus. (Tab. VII. fig. 18.) 



Obscure seneous ; the three basal joints of the antenna? obscure rufous ; thorax as broad as long, sides three- 

 dentate ; elytra closely punctate-striate, covered with yellowish scales ; anterior tibiae with a triangular 

 tooth near the apex. 



Length 2| lines. 



Eab. Mexico, Cordova, Toxpam(&^), Playa Vicente {Edge); ?mwK(coll.Jacoby). 



