INSECTS AFFECTING FOREST TREES. 



489 



This beetle was found by the writer at work in balsam in company with Toiniciis 

 IhihaiiicHS Lee, in hard pine with 7. calligraphus Germ, and T. cacograpli::s Lee., in 

 white pine with T. calligrapkus Germ, and T. piiii Say, and in spruce with Poly- 

 i^rap/tiis ritjipciiiiis Kirby. 



Description. This is another medium sized Toiiiicus, being about 'g of an inch 

 in length, cylindrical, and varying in color from light to very dark brown. It is 

 a little shorter and more slender than Toviiots caco- 

 i^raphns Lee. ; the posterior, dorsal portion of the 

 wing covers is more hairy and the declivity is not 

 so well marked. There are three principal tubercles 

 or chitinoLis teeth, a small dorsal one near the median 

 line and two larger, widely separated teeth on the 

 flattened area of the declivity. Between the larger 

 tubercles and farther from the median line there are 

 several minute chitinous points marking the real 

 margin of the declivity. There is considerable varia- 



, , ,,,...,. . FIG. S. DECLIVITY OF TOMICUS CAE- 



tion in the teeth on the declivity in this species, par- latus. 



ticularl)' of those marking the border or edge and the okicinal. 



illustration represents a specimen in which the latter are unusualh' well developed 

 (Figure 8.). The prothorax is rather finely granulated and the wing covers are 

 marked with longitudinal rows of rather fine punctures. 



The pupa has been described by Dr. Fitch as resembling the perfect insect in 

 size and shape. It is white at first and as maturity approaches it may darken in 

 color. The larva is a soft white grub resembling those of allied species. Its 

 polished liead is white at least during the early periods of its life. The man- 

 dibles are chestnut brown and there are no indications of eyes or feet. 



The galleries of this species, judging from the few specimens collected, are 

 more irregular than those of some other members of the genus. The central or 

 entrance chamber is well marked and from this three or more females may make their 

 wa_\- in rather tortuous courses, sometimes parallel with and sometimes nearly across 

 the bark fibers. 



The eggs are deposited on both sides of the burrows and the grubs or larvae 

 e.xcavate \er\- irregular galleries for a distance of about an inch and end their labors 

 in a rather deep oval cell in the sap wood in which the grub transforms to the 

 beetle. 



Dr. Fitch noticed this insect in liis 4th Report under the name of Toiiiiciis 

 xylograpliHS Say and he comments as follows on the boring habits of this species. 



