1894.] Entomoiogy. 819 
slightly behind the middle. Anteriorly there is a fine transverse line 
crossing the median one at right angles. Beneath is a smooth subquad- 
rate space, usually bounded at sides and behind (except for a short dis- 
tance at middle) by broad, deeply impressed lines. 
Metathorax similar, but the lines beneath effect a junction at the 
middle. 
Abdomen with the first seven segments quite similar in form, suban- 
gulate at the sides, median dorsal and anterior transverse lines distinct, 
the former more so. Beneath is a very well marked submarginal plica. 
The eighth segment is larger, longer, more perfectly chitinized, sides 
slightly rounded. Median dorsal line very distinct, with a less distinct 
oblique one on each side. Beneath there is an impressed median line 
which has posteriorly a slightly elevated carina on each side; external 
to this is a sinuous broader line each side, and outside of this again a 
very deep impression which extends from a point distant about one-fifth 
from the basal lateral margin to the posterior angle of the segment. 
The anal segment is small, carinate, more distinetly at base, visible 
only from beneath, being overlaid by a corneous plate bearing two spi- 
nose and granulate processes. Viewed from above the space between 
these processes is somewhat semicircular in outline, and the two cu/-de- 
sacs between them are distinctly visible. From beneath the processes 
look almost straight and the cul-de-sacs do not appear. The accompany- 
ing figure will give a much better idea of this complicated structure 
than a description can conve 
Spiracles in nine pairs, the iret situated in the mesothorax under 
the anterior angles, the rest abdominal. The pair on the first abdom- 
inal segment is dorso-lateral, the next lateral,and the remainder (in 
segments 3 to 8) are ventro-lateral; all except the last pair, which are 
behind the middle, are placed nearer the anterior than the posterior 
margin of the segment. 
Legs stout, cox: not very prominent, femora strong, broader at tip 
and compressed within, tibial pieces subcylindrical, claws single, long, 
curved, with an indistinct blunt tooth and a bristle near the base. The 
suture between the femur and trochanter is well marked, and these as 
well as the tibiz are rather sparsely bristled. 
Larvs of the above mentioned species were taken at Iowa City on 
the 13th of April from beneath the bark of a rotting elm log. On the 
7th of May one of them changed to an elongate white pupa, 16 mm. 
in length, which had the power of moving very rapidly about on its 
back, tail foremost. It was very sensitive, a slight touch on any of 
