636 SEERICORNIA. 



testaceous, &c. From P. gracilis it may be known by its narrower, less parallel form, 

 the pale slender legs, the shorter antennse, which have much shorter rami in the 

 male, &c. 



13. Ptilodactyla obovata, 



$. Oboval, short, moderately convex, rather dull, the elytra shining, thickly clothed with short pallid 

 pubescence ; rufo-fuscous, the antennae and legs testaceous. Head densely, rugulosely punctate, the eyes 

 rather small ; antennae long and slender, feebly serrate. Prothorax short, moderately convex in front, 

 rounded at the sides, the latter rapidly converging from about the basal third forwards, the hind angles 

 acute ; the base trisinuate, obsoletely denticulate at the sides, with a short projecting tooth in the centre ; 

 the surface densely granulate-punctate. Scutellum rugulose, deeply notched in front, and with a narrow 

 median groove extending thence to near the apex. Elytra wider than the prothorax, narrowly margined 

 and a little rounded at the sides, the apices sharp and slightly produced, the humeri rounded ; punctate- 

 striate, the interstices rugulosely punctured. 

 Length 4, breadth 2 millim. 



Hab. Mexico, Jalapa {Edge). 



Two specimens. An obscure little species, apparently not very closely allied to any 

 of those described here, and chiefly distinguishable by its obovate shape, canaliculate 

 scutellum, and densely punctured thorax. 



14. Ptilodactyla brevicollis. (Tab. XXVII. fig. 17, $ .) 



2 • Oval, narrow, flattened above, shining, thickly clothed with rather long fine pallid pubescence ; fusco- 

 testaceous, the eyes black, the antennae and legs testaceous. Head very finely punctate, the eyes 

 moderately large ; antennae long and slender, feebly serrate, joints 3 and 4 equal in length. Prothorax 

 very short, moderately convex in front, sharply margined and distinctly explanate at the sides behind, 

 the sides rounded and converging from about the basal third forwards ; the base trisinuate, almost smooth, 

 with a projecting tooth in the centre ; the surface very finely, rather sparsely punctate, and transversely 

 depressed on the disc before the base. Scutellum concave, deeply notched in the centre in front, almost 

 smooth. Elytra elongate, rounded and acutely margined at the sides, narrowing from about the middle, 

 shallowly punctate-striate, the punctures of the striae becoming coarse and deep at the sides, the interstices 

 thickly, rugulosely punctate. 



Length 4, breadth If millim. 



Hab. Mexico, Toxpam (Salle). 



One example. Easily distinguishable by the deeply notched, concave scutellum. 

 The insect is oval in shape, with a very short, comparatively smooth thorax, the 

 sides of which are rounded and distinctly explanate. The scutellum is so broadly 

 hollowed down the middle as to appear concave. P. brevicollis somewhat resembles 

 P. marginata, but it is narrower, and has a much more transverse thorax, punctate- 

 striate elytra, &c. 



15. Ptilodactyla corvina. (Tab. XXVII. fig. 21, s , var.) 



$ . Rather short, elliptic, convex, very shining ; head, prothorax, and under surface very sparsely and 

 finely pubescent, the rest of the surface apparently glabrous ; black, the head and prothorax sometimes 

 of a more piceous tint, the under surface partly piceous, the antennae black, with the basal joint often 

 reddish, the legs piceous or brownish, with the femora paler ; the upper surface sparsely and minutely, 



