OF WASHINGTON. 
119 
The body is very flat, oval in outline, bearing a lateral 
fringe similar to that of an Ascalaphus (as figured by West- 
wood, Trans. Ent. Soc. Lond., 1888, pi. i), but more uniform ; 
a dorsal row of tubercles, and a tapering tail, one-fifth as long 
as the body. The color is a dirty brown above, paler beneath. 
Length 7 to 10 mm.; width 3^ to 4! mm. 
FIG. 12. Undetermined coleopterous larva: 
lateral spine of tail with small scale-bearing tubercle 
such as cover tail and head, at base; B, D, side 
views of mushroom-like scales and tubercles, from 
body; C, top view of D. 
FIG. 13. Middle leg and fringe of meso- and meta thorax] 
and first abdominal segment of undetermined coleopterous] 
larva (enlarged about 27 diameters). 
The vestiture is so remarkable as to deserve special mention. 
It consists of hairs modified in a manner unknown to me in 
any other insect. A very few of the simplest ones are found 
in unexposed places and appear as simple flat scales, generally 
truncate, but a few are sharp pointed, set in a shallow pit, 
