84 CEHOTRUS. 



as the body, second and third joints very short, equal. 

 Thorax transverse, narrow, sides straight, anterior and 

 posterior margin parallel. Scutellum triangular. Elytra 

 parallel, closely and irregularly punctured , their epipleurae 

 continued below the middle. Tibiae unarmed. Metatarsus 

 as long as the 3 following joints together. Claws appendi- 

 culate. Prosternum very narrow but distinct. Anterior 

 coxal cavities closed. Posterior femora very moderately 

 incrassate. 



The transverse thorax , very short second and third 

 joints of the antennae in connection with the length of 

 the latter and the closed coxal cavities will distinguish 

 this genus from any others with which I am acquainted , 

 its place being perhaps best found amongst Chapuis' 8th 

 group the Oxygoninae, while the posterior femora , although 

 less strongly developed than is generally the case, are 

 yet sufficiently incrassate as to leave no doubt as to the 

 position of the insect in the Halticinae. 



Cerotrus melanocephalus , n. sp. 



Elongate , parallel , black. Clypeus , thorax and the femora 

 flavous. Thorax impunctate. Elytra distinctly punctured. — 

 Length 2 lines. 



Head black , impunctate , with a deep triangular de- 

 pression at the vertex. Clypeus flattened, triangular, 

 flavous as well as the frontal tubercles. Antennae fili- 

 form , as long as the body , basal joint and the base 

 of the second one flavous, the rest black, second and 

 third joints very short, of equal length, the following 

 ones very elongate. Thorax narrowly transverse, anterior 

 and posterior margins nearly straight, the sides very slightly 

 rounded , anterior angles acute but not produced , surface 

 impunctate, flavous. Scutellum triangular, black. Elytra 

 four times as long as the thorax, parallel, the apex very 

 rounded , nearly truncate , slightly depressed below the base, 

 closely and distinctly punctured , the punctures getting more 



Notes from the Leydeii IMxiseum, "V^ol. "VI. 



