HEMLOCK CATERPILLARS. 873 
by this beetle, which has been obligingly identified by Dr. G. H. Horn, 
of Philadelphia. Not only the bark of dead trees, but that of health v 
large trees had harbored great numbers of these beetles. They, how- 
ever, had disappeared from the holes at the date (July 22) I was at the 
White Mountains, and but a single dead specimen was found. Similar 
mines were found in a hemlock at Brunswick, Me. 
8. The brown prionus beetle. 
Orthosoma brunneum (Forster). 
Order Coleoptera ; family Cerambycid^e 
Mr. F. G. Schaupp writes me as follows concerning this beetle, which 
is not harmful to the tree, attacking it usually when in the last stages 
of decay : 
In a hemlock tree I found, July 20, in New York, hundreds of the larvae of all 
sizes from 5-50 mm in length, the wood being exceedingly hard and tough, but although 
the new developed imagines (soft) were very abundant, and although I found some 
moldy dead pupae, I could not find a live pupa. 
AFFECTING THE LEAVES. 
9. Tolypelaricis. (Fitch). 
Aug. 30, I beat a freshly evolved specimen of this moth from a hem- 
lock tree at Brunswick, Me., so that I have no doubt it lives on this tree 
as well as the larch and white pine. 
10. Tetrads lorata Grote. 
Order Lepidoptera ; family Phal^xid^e. 
The moth was bred from a large twig-like caterpillar found on the 
hemlock at Brunswick, Maine, August 25. The moth appeared in the 
breeding-box April 25. Tetrads crocallata feeds on the sumac, accord- 
ing to Mr. Saunders. 
Larva. — Head flattened, square in front but not notched, slightly full on each side 
of a slight median impressed line. Pale gray, with a diffuse straight vertical band 
on each side, the middle being clear whitish gray. These dark latero-frontal bands 
and the pale gray median band are continued on to the prothoracic segment. The 
median whitish band is continued on to the meso-thoracic segment, but forms there 
two linear parallel white thread-like lines inclosing a linear brown median line ; on 
each side of this ring, directly behind the prothoracic spiracle, is a large rough 
tubercle ; the granulations coarse and prominent; white on the sides, above tawny- 
brown. On the first and second abdominal segments is a pair of swollen infra-spirac- 
ular rounded tubercles, concolorous with the body. The body is dull reddish brown. 
The two piliferous warts are connected and converted into a transverse tubercle, 
becoming larger towards the fifth abdominal segment ; the tubercles behind rather 
large but not connected. From the fifth abdominal segment to the end of the supra- 
anal plate extends a black median line. Along the sides of the abdome*n, on seg- 
ments 2-5, is a lateral raised short brown line edged below with pale gray ; these are 
situated in front of the spiracles. Below are three large tubercles on each segment, 
