652 SEEKICOKNTA. 



convex in front, sharply margined at the sides and apex, and slightly explanate at the sides behind, the 

 latter rounded and rapidly converging from a little before the base to the apex, the hind angles acute ; 

 the base trisinuate, denticulate ; the surface closely, rather coarsely granulate-punctate. Scutellum 

 closely punctured, with a short notch in the centre in front. Elytra moderately elongate, wider than the 

 prothorax, parallel in their basal half, sharply margined at the sides, the humeri rounded ; distinctly 

 punctate-striate, the interstices flat and rugulosely punctured. Pifth ventral segment in the male 

 narrowly and very deeply emarginate at the apex, and with a raised space on either side of the emargi- 

 nation, which is fringed with hairs within, the segment appearing depressed in the middle behind. Tarsal 

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

 Length 8-9f , breadth 3-4 millim. (<?$.) 



Hab. Costa Rica, Volcan de Irazu {Rogers) ; Panama, Volcan de Chiriqui 

 (Champion). 



One male and two females from Costa Rica and a female from Chiriqui, the latter 

 larger and more robust than the others and having the scutellum denticulate in front. 



This insect is very like P. denticulata, of which at first sight it would appear to be 

 nothing more than a large variety, but the form of the fifth ventral segment of the 

 male is quite different. 



46. Ptilodactyla serrata. 



Moderately elongate, narrow, flattened above, shining, thickly clothed with rather long pallid pubescence ; 

 fusco-testaceous, the antennas and legs testaceous. Head densely punctured, the eyes large ; antennas 

 elongate, slender, the joints 4-10 each with a moderately long ramus in the male and feebly serrate 

 in the female. Prothorax short, moderately convex in front, the sides slightly explanate behind, 

 sharply margined, and rounded and rapidly converging from about the basal third forwards, the hind 

 angles acute ; the base bisinuate, the entire margin strongly denticulate ; the surface closely granulate- 

 punctate. Scutellum rugulosely punctured, notched in the centre in front. Elytra elongate, subparallel 

 in their basal half, wider than the prothorax, sharply margined at the sides, the apices rather sharp, the 

 humeri rounded ; obsoletely punctate-striate, the interstices rugulosely punctured. Eifth ventral segment 

 arcuate-emarginate at the apex in the male. Tarsal claws with an acute curved tooth in the male and 

 rectangularly dilated in the female. 



Length 5|-6, breadth 2i-2i millim. ( <$ $ .) 



Hab. Costa Rica, Cache (Sogers) ; Panama, Volcan de Chiriqui 3000 feet (Champion). 



A male example from each locality. We also possess a mutilated female specimen 

 labelled as from Guatemala, but this locality requires confirmation. Smaller and more 

 depressed than P. dentieulata, the entire basal margin of the thorax very distinctly 

 denticulate, the fifth ventral segment very differently formed in the male. The 

 denticulation of the base of the thorax is unusually distinct, a character separating the 

 species from most of the allied forms. 



47. Ptilodactyla germana. 



Oblong-elliptic, flattened above, shining, thickly clothed with pallid pubescence ; obscure ferruginous, with the 

 head, the disc of the prothorax, and the disc of the elytra piceous, the elytra becoming paler towards the 

 apex, the under surface in great part ferruginous, the antennas and legs obscure testaceous. Head rugulosely 

 punctured, the eyes moderately large ; antennas very long and slender, the joints 4-10 each with a 

 moderately long ramus in the male and acutely serrate in the female. Prothorax transverse, rather 



