BIRCH BORERS. 485 



3. Croesus latitarsus Norton. 

 Order Hymenoptera ; family Tenthredinid^. 



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. Ainer. 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. Cossus sp. 



The following note is from Mrs. Anna K. Dimmock (Psyche, iv. p. 



274): 



Lintner (Entom. Contrib., iv, 1878, p. 244-245) states that the larvte 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. Chrysohothris G-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., ^j^ lu.—Ohrysoboth- 

 1881, p. 129) on authority of G. Hunt, to be found "under bark Hs 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 (M^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 denticornis Kirby (Fauna Boramer., 1837, pt. 4, p. 145). G. Dimmock 

 has reared this species from larvae found in partly decayed bark of Betnla papyraceai 

 on Mount Washington, New Hampshire. The imagos emerge from the pupsje 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 larvte 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 larv;e taken in Milton, Massachusetts, No- 

 vember 10, 1883, fed through the winter and produced a single beetle. From these 



