654 SEKRICOKNIA. 



about the basal third forwards, the hind angles acute ; the base trisinuate, finely denticulate, and with a 

 short projecting tooth in the centre ; the surface closely granulate-punctate. Scutellum rugulosely punc- 

 tured, deeply notched in the centre in front. Elytra moderately long, a little wider than the prothorax, 

 sharply margined at the sides, narrowing from the middle, and somewhat acutely produced at the apex, 

 the humeri rounded ; shallowly but distinctly punctate-striate to near the apex, the interstices thickly, 

 rugulosely punctured, granulate towards the base in some specimens. Eifth ventral segment broadly and 

 very deeply truncate-emarginate at the apex, and broadly depressed along the middle in front of the 

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

 female. 

 Length 44-5^, breadth 1^-2| millim. ( d ? .) 



Eab. Mexico, Omilteme, Xucumanatlan, and Chilpancingo in Guerrero, Cuernavaca 

 in Morelos (H. H. Smith). 



Found in numbers in Guerrero. This is one of several very closely allied Central- 

 American species, amongst which it may chiefly be known by its somewhat conical, 

 acutely margined, granulate thorax, the deeply notched scutellum, the sharply 

 margined, rather acuminate, punctate-striate elytra, and the form of the fifth ventral 

 segment in the male. The emargination of this segment is so deep in this sex that 

 the lateral portions project like a pair of forceps, these being visible from above. 

 P. forcipata resembles P. denticulata in shape, but it is less elongate and much 

 smaller. Some of the males have the third joint of the antennas considerably shorter 

 than the fourth. 



50. Ptilodactyla granulicollis. 



Moderately elongate, flattened above, shining, thickly pubescent ; rufo-fuscous or obscure rufo-testaeeous, the 

 legs and antennae testaceous. Head rugulosely punctured, the eyes large ; antennas long and slender, the 

 joints 4-10 each with a moderately long ramus in the male and serrate in the female. Prothorax short, 

 convex and much narrowed in front, sharply margined at the sides and apex, the sides rounded behind 

 and rapidly converging from about the basal third forwards ; the base trisinuate, finely denticulate, and 

 with a short projecting tooth in the centre ; the surface thickly granulate-punctate. Scutellum rugulosely 

 punctured, deeply notched in the centre in front. Elytra finely punctate-striate, the interstices rugulosely 

 punctured. Fifth ventral segment broadly and not very deeply arcuate-emarginate at the apex in the 

 male. 



Length 3 T ^-5|, breadth l|-2f millim. ( <$ $ .) 



Hah. Guatemala, San Geronimo and Capetillo {Champion). 



Found in some numbers at Capetillo. Extremely closely allied to P. forcipata, and 

 only separable from it by the different form of the fifth ventral segment in the males. 

 This character, however, is perfectly constant in the numerous males of both species 

 examined. Two males from Vera Cruz (H. H. Smith) and a female from Cordova, 

 Mexico (Hoge), probably belong here : the males have slightly longer elytra than those 

 from Guatemala and the female is considerably larger and broader. 



P. granulicollis may prove to be inseparable from P. angustata, Horn, from Florida, 

 specimens of which are not obtainable for comparison. 



