256 Mr. C. 0. WaterhoLiae on Coltoptera 



Polycesta depressa, L. & G., nee Liun. 



Mr. Saunders in his Catalogue proposed the name Goryi 

 for this species. 



The specimen marked " cribrata, Th., type " in M. Ober- 

 thiir^s collection, are the same species ; P. Goryi has 

 priority. 



Polycesta alternans, sp. n. 



Elongate, slightly and evenly convex; purple-coppery, 

 with green interniixed. Thorax broader than the elytra, 

 somewhat flattened dorsally, broadest behind the middle, 

 obliquely narrowed in front ; strongly punctured, the punc- 

 tures slightly separated on the disk, crowded at the sides, 

 with a smooth median line : base with a transverse, dull 

 black, smooth band ; basal fovea distinct, but not large. 

 Elytra with the costfe subequal, alternately green and 

 coppery, the first extending only to the middle, the third and 

 fifth only slightly more prominent than the others; the 

 intervals rather strongly, closely, and irregularly punctured, 

 especially at the sides and apex ; near the scutellum the 

 punctures are finer and less close. Tibiae and tarsi blackish. 

 Underside coppery, with green intermixed, the green forming 

 a narrow baud near the posterior margins of second, third, 

 and fourth segments, the margins themselves black. Pro- 

 sternum finely punctured, the punctures not close together. 

 The middle of the basal segtaent of the abdomen is similarly 

 punctured, but the punctures are rather stronger and a little 

 closer on the following segments, and the apical segment is 

 closely punctured ; the punctuation at the sides is fine and 

 very dense. 



Long. 26 mm. 



Hub. Pinos Altos, Chihuahua, Mexico [Buchan-Hepburn) . 



A single example from Messrs. Godman and Salvin's 

 collection, received too late for inclusion in the ' Biologia.^ 



The nearest allied species in the Museum is named 

 cribrana, Mots., which must not be confounded viii\\cribratu. 

 Mots. 



Polycesta regularis, sp. n. 



Oblong, parallel, much flattened, only a little more than 

 twice as long as broad, nearly black, but with a slight 

 cyaneous tint below. Elytra ferruginous. Thorax not 

 quite twice as broad as long, black, dull, broadest behind the 

 middle, strongly angular at the sides, obliquely narrowed in 

 front and behind ; the space from the lateral angle to the 



