37G CLAYICORNIA — TRICHOPTEKYGIDAE. 



prominent ; thorax broadest in middle, constricted behind ; 

 elytra ovate, closely asperate in transverse rows, apices 

 obtuse. L. -j^ 1. Very rare. F. insigne, Mat. 



Ill, Lateral impressed lines on thorax convergent 

 forward. 



Nearly oval, rather broad. Chestnut-brown, scantily 

 covered with very short, pale hairs ; antennae and legs 

 yellow ; under-side of mouth, coxae, posterior margin of 

 metasternum and abdomen yellowish. Head large, broad, 

 eyes small, scarcely prominent ; thorax large, alutaceous, 

 not tul^erculate, broadest somewhat behind middle, sides 

 scarcely sinuate behind ; elytra closely and very feebly 

 asperate, slightly dilated behind, sides rounded, apices 

 broad, strongly rounded, sutural angle obtuse. L. yV 1. 

 Eare. P. caesum, Er. 



b. Thorax with an indistinct, very short, linear impres- 

 sion on each side. 



Elongate, rather convex, closely and strongly tuberculate. 

 Brown-red, with short, yellow hairs ; antennae and legs 

 pale yellow ; under-side yellow-red. Head large, triangular, 

 eyes large and prominent ; thorax broadest before middle, 

 constricted behind ; elytra long, scarcely broader than 

 thorax, sides parallel, apices obtuse. L. -f-^ — j-^ 1- ^^t 

 uncommon. P. foveolatuvi, Allib. 



3Iillidiuni. 



Ovate, strongly convex, almost bare. Black or pitch- 

 black ; antennae and legs yellow ; under-side pitchy, with 

 mouth, coxae and apex of abdomen yellow. Thorax 

 broadest behind middle, strongly constricted behind, 

 alutaceous, with a very deep central furrow and a shorter 

 deep furrow on each side (divergent forward) ; scutellum 

 with three impressions ; elytra ovate, rather deeply and 

 diffusely punctured. L. /^ 1. Not uncommon. 



M. trisulcatum, Aub. 



Actidiuni, 



A, Body hairy, not shiny. 



Linear, elongate, rather convex. Black ; antennae and 

 legs yellow ; under-side pitchy, with mouth and coxae 

 yellow. Head large, eyes small, prominent ; thorax as long 



