PTILODACTYLA. 657 



Nine specimens. Very nearly allied to P. deleta, but less parallel in shape, especially 

 in the female, the basal margin of the thorax almost smooth, the body uniformly 

 piceous or fuscous. In some of the specimens the punctures of the striae are obsolete, 

 but the striae are still visible. The feebly notched scutellum separates it from 

 P. granulicollis, &c. 



A mutilated male example from Chiriqui perhaps belongs here. 



56. Ptilodactyla debilis. 



Moderately elongate, narrow, flattened above, shining, thickly clothed with tine short greyish pubescence ; 

 black or piceous, the legs and sometimes the two basal joints of the antennae testaceous. Head rugulosely 

 punctured, the eyes moderately large ; antennae long and stout, the joints 4-10 each with a short ramus 

 in the male and serrate in the female. Prothorax short, feebly convex in front, compressed at the sides 

 anteriorly, the sides subparallel behind, and arcuately converging forwards, the hind angles acute ; the 

 base trisinuate, smooth ; the surface thickly, in some female specimens finely and more sparsely, punctate. 

 Scutellum punctured, notched in the centre in front. Elytra moderately long, wider than the prothorax, 

 parallel in their basal half, slightly depressed on the disc below the base, narrowly margined at the sides, 

 the humeri rounded ; distinctly, but shallowly punctate-striate on the disc, the interstices more finely, 

 rugulosely punctate. Fifth ventral segment shallowly arcuate-emarginate in the male. Tarsal claws 

 with an acute tooth in the male and rectangularly dilated in the female. 



Length 2|-3f, breadth 1-1 £ millim. ( d $ .) 



Hab. Mexico, Chilpancingo in Guerrero (II. H. Smith) ; Guatemala, Cerro Zunil 

 (Champion). 



Seven examples, one only, a male, being from Mexico. This very obscure species is 

 allied to P. tenuis, but it is less elongate, the third and fourth joints of the antennae are 

 equal in length, and the thorax is more transverse and more rounded at the sides. 



57. Ptilodactyla rotundicollis. 



$ . Elongate, narrow, flattened above, shining, thickly clothed with fine greyish pubescence ; pitchy-black, 

 the antennas piceous, the legs and palpi testaceous, the femora flavous. Head rugulosely punctured, the 

 eyes moderately large; antennas elongate, stout, the joints 4-10 serrate. Prothorax short, moderately 

 convex in front, compressed at the sides anteriorly, widest at the middle, the sides acutely margined, 

 rounded, and converging in front and behind ; the base trisinuate and with a short projecting tooth in 

 the centre, smooth ; the surface thickly, finely punctate. Scutellum rugulosely punctured, notched in 

 the centre in front. Elytra moderately elongate, wider than the prothorax, parallel in their basal half, 

 slightly depressed on the disc below the base, narrowly margined, the humeri rounded ; punctate-striate 

 to near the apex, the interstices rugulosely punctured. 

 Length 3|, breadth If millim. 



Hab. Guatemala, San Geronimo (Champion). 



One example. Closely allied to P. debilis, but differing from it (and from nearly all 

 the other species described here) in the posteriorly narrowed thorax, the sides of which 

 are acutely margined and strongly rounded. 



58. Ptilodactyla tenuis. (Tab. XXVII. figg. 26, s ; 26 a, antenna.) 



3 . Elongate, narrow, subcylindrical, flattened above, shining, rather sparsely clothed with moderately long 

 greyish hairs ; black, the tibiae and the apices of the femora piceous, the rest of the legs testaceous. 

 Head thickly punctured, the eyes moderately large ; antennae stout, nearly as long as the body, the joints 



biol. cente.-amee., Coleopt., Vol. III. Pt. 1, August 1897. 4P 



