LITTLE BARK-BEETLES. 715 



the terminal third of the wings. The autennte are clavate, not extend- 

 ing beyond the coxoeof the first legs. It is larger, more bulky than the 

 adult. Length, 0.22 inch. 



The beetle (Fig. 247) is cylindrical, with the head and prothorax to- 

 gether three fourths as long as the rest of the body; end of the abdo- 

 men suddenly truncated, slanting, forming a scoop, the declivity smooth, 

 concave, and bounded by high walls, which are four-toothed on each 

 side, the third from the top the largest. On each wing-cover are eight 

 lines Qf fine, raised tubercles ; prothorax with concentric rows of fine 

 tubercles, but smooth on the posterior third. Seen from beneath, the 

 wing-covers project well beyond the end of the abdomen. Color, pale 

 tan- brown, a little paler on the thorax than on the wing-covers. Body 

 covered with stiff", dense hairs. Length, 0.20 inch. 



43. The little bark-beetle. 

 Pityophthorus annectens? LeC* 



Under the bark of small sapling pines, mining exceedingly fine slender wavy bur- 

 rows running in every direction, a cylindrical chestnut-brown bark-beetle much 

 smaller than anj' of our other species, measuring only 0.0(3 in length, its surface shin- 

 ing and pierced with small deep punctures which on the wing-covers are placed in 

 close rows, the thorax but half as long as the wing-covers and rough anteriorly from 

 dense minute elevated points, the middle of the outer edge of the wing-covers show- 

 ing a slight concavity, the declivity at their tips with a moderate excavation formed 

 by a smooth longitudinal groove upon each side of the suture, the suture itself being 

 elevated and having on each side of it an impressed line m which are minute punct- 

 ures, the outer margin of the declivity with numerous fine bristles, but without any 

 projecting teeth, and the tips of the wing-covers drawn out into a very small acute 

 point. 



" This beetle verj^ closely resembles the T.r«wiwZorwm of Perris, which 

 mines the small twigs of European pines, but it is evidently a distinct 

 species. It was described by Dr. Harris in the Transactions of the 

 Natural History Society of Hartford, Conn., vol. i, p. 82, from a speci- 

 men imperfectly displayed, which he met with in the collection of Mr. 

 Halsey, but he had no knowledge of its habits. And this I believe is 

 the only notice of this insect which has hitherto appeared. Its minute 

 size has probably caused it to be overlooked by collectors, although it 

 is so common that the bark of dead young pines which are 2 inches 

 in diameter or less can seldom be broken away without coming upon 

 its tracks, with some of the dead insects in them. Its tracks are readily 



* Le Conte states that this is not the Tomicua pusillus of Harris, as Fitch supposed, 

 "but is quite different, and is closely allied to T. ramulorum Perris, which is consid- 

 ered by Eichhoif as the same with typograpluis Ratzeburg." Le Conte adds in a letter 

 that this is most probably P. piiberulus. He also in the same letter adds : " P. annec- 

 tens LeC, found in Florida \u yellow pine, resembles in sculpture ramulorum, and 

 agrees with Fitch's description of 34 [of Packard's Bulletin] in having the elytral 

 punctures arranged in rows, and the sutural angle acute. It may really be the same 

 as your 34, but as the localities are so widely apart, and the food tree different, I am 

 unwilling to express a positive opinion until I can compare the specimens." 



