658 SEKRICOKNIA. 



4-10 each with a rather stout ramus of about the same length as the joint to which it is articulated, 

 joint 3 subtriangular, considerably shorter than 4. Prothorax transverse, subcorneal, thickly punctured, 

 the hind angles acute ; the base trisinuate, almost smooth. Scutellum thickly punctured, flat, with a 

 shallow notch in the centre in front. Elytra elongate, considerably wider than the prothorax, parallel 

 to beyond the middle, narrowly margined at the sides, the humeri rounded ; shallowly but coarsely 

 punctate-striate to near the apex, the interstices almost flat and rugulosely punctured. Legs long and 

 slender. Tarsal claws with an acute curved tooth. 

 Length 4, breadth If millim. 



Hal. Guatemala, Quiche Mountains 7000 to 9000 feet {Champion). 



Two males. A very small, narrow, elongate species, with stout, black antennae, a 

 short, subcorneal thorax, and rather coarsely punctate-striate elytra. It approaches 

 P. forticornis, but differs from that insect in the form of the thorax and scutellum, the 

 slender legs, &c. 



59. Ptilodactyla costaricensis. 



$ . Oblong-elliptic, rather depressed, shining, thickly clothed with brownish pubescence ; nigro-piceous, the 

 antennae brown, the legs obscure testaceous. Head rugulosely punctured, the eyes rather small ; antennae 

 elongate, the outer joints becoming acutely serrate, 3 very long, slightly longer than 4. Prothorax very 

 short, broad, moderately convex in front, acutely margined and somewhat explanate at the sides, the 

 latter rounded and converging from about the basal third forwards, the hind angles acute ; the base 

 trisinuate, feebly denticulate at the sides and in the middle, and with a short projecting tooth in the 

 centre ; the surface closely and finely granulate-punctate. Scutellum rugulosely punctured, deeply 

 notched in the centre in front. Elytra moderately elongate, wider than the prothorax, sharply margined 

 and a little rounded at the sides, the humeri rounded; finely and obsoletely punctate-striate on the disc, 

 the rest of the surface very finely and rugulosely punctured. Tarsal claws long, angularly dilated at the 

 base only. 



Length 5§, breadth 2| millim. 



Hah. Costa Rica (Bogers). 



One example. Differs from all the other species of the genus described here in the 

 form of the tarsal claws, these being unusually long and angularly dilated at the base 

 only (the angularly dilated portion of the claw usually extending to near the middle in 

 the females of this genus). P. costaricensis resembles P. subparallela and P. parallela 

 in shape, but is less elongate and less parallel. 



LACHNODACTYLA. 



Apical joint of the maxillary palpi very elongate, large, and cultriform, with the inner side cleft down the 

 middle and spongy within, in the male, and elongate, slender, and obliquely truncated at the tip in the 

 female ; the penultimate joint short, about half the length of the second. Tarsal claws dilated to beyond 

 the middle and armed with an acute curved tooth in the male, acutely rectangularly dilated in the female. 

 The other characters as in Ptilodactyla. 



The two species from Mexico or Guatemala referred to this genus differ from 

 Ptilodactyla in both sexes in the form of the maxillary palpi, the third joint being 

 relatively very short and the fourth elongate, the latter being very elongate, large, 

 and somewhat cultriform in the male. The apical joint in this sex is cleft down 



