BIRCH BORERS. 485 
3. Croe8U8 latitarsus Norton. 
Order Hymenoptera ; family Tenthredinid^e. 
The following note is from Mrs. Dimmock's article on birch insects 
Psyche, p. 286) : 
Croesus latitarsus Norton (Proc. Entom. Soc. Phil., 1862, i, p. 199). Norton (/. c.) 
describes the male of this species, and later (Trans. Amer. Entom. Soc, 1867, v. i, p. 
84) describes the female, and adds, "Bred by Mr. Walsh from larvae feeding on 
birch." 
4. Clytus? larva. • 
Xylotrechus colonus (Fabr.)?. 
Plate XII, Fig. 3, represents the mouth-parts of a Clytus nearly allied 
to if not identical with Xylotrechus colonus. 
5. C088U8 sp. 
The following note is from Mrs. Anna K. Dim mock (Psyche, iv. p. 
274): 
Lintner (Entom. Contrib., iv, 1878, p. 244-245) states that the larvae of a Cossus, 
the pupal cases of which prove to be those of some as yet undescribed species, bore 
in the wood of Betula populifolia. 
6. Chrysobothris 6-signata Say. 
The beetle and pupa of this Buprestid borer were 
found in the yellow birch June 1, at Providence. 
The notes on the three following species are copied 
from Mrs. Dimmock's Insects of the Birch : * 
7. Tylonotus bimaculatus Hald. 
Tylonotus bimaculatus Hald. (Trans. Amer. Philos. Soc, 1847, 
v. 10, p. 38) is said by Packard (Bull. 7, U. S. Entom. Comm., FlG m._chrysoboth- 
1881, p. 129) on authority of O. Hunt, to be found "under bark ris Q-signata. Smith 
of white or paper birch, northern New York." 
* The following species do no injury to the tree, only living in or under the bark, 
or in the wood of dead and decaying trees : 
Nyctobates pensylvanica De Geer (Me'm., 1775, v. 5, p. 52; pi. 13, fig. 10). Schaupp 
(Bull. Brooklyn Entom. Soc, July 1881, v. 4, p. 23) writes of this species, "Pupae in 
beech July 15); in hemlock July 18; in birch July 21." 
Campylus denticomis Kirby (Fauna Boramer., 1837, pt. 4, p. 145). G. Dimmock 
has reared this species from larvae found in partly decayed bark of Betula papyraceat 
on Mount Washington, New Hampshire. The imagos emerge from the pupae about 
July 1, and are abundant during July in the White Mountains. 
Trogosita corticalis Melsh. (Proc. Acad. Nat. Sci. Phil., Oct. 1884, v. 2, p. 109), 
Schaupp (Bull Brooklyn Entom. Soc, July 1881, v. 4, p. 23) writes of this species, 
"Larvae in birch July 8, in beech August 14, in sugar maple July 19." 
Ceruchus piceus Weber (Observ. Entom., 1801, p. 84). The pupae are mentioned by 
Fuchs (Bull. Brooklyn Entom. Soc, Dec. 1882, v. 5, p. 59) as being very common in 
an old beech stump, and are briefly described. The larvae are mentioned by G. 
Dimmock (Direct. Collect. Coleopt., 1872, p. 20) as living "in decayed chestnut and 
willow." The larvae are very abundant in decayed and fallen wood of Betula alba 
during autumn. Quite a large number of larvae taken in Milton, Massachusetts, No- 
vember 10, 1883, fed through the winter and produced a single beetle. From these 
