PACKARD.] THE STOUT PINE-BORER. 803 



ing beyond the coxoe of the first legs. It is larger, more balky than 

 the adult. Length, 0.22 inch. 



The beetle (Plate LXX, Fig, 4) is cylindrical, with the head and pro- 

 thorax together three-fourths as long as the rest of the body ; end of 

 the abdomen suddenly truncated, slanting, forming a scoop, the decliv- 

 ity 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 of 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. 



The Stout Pine-Borer, Bendroctomis ohesus Mannh. (Plate LXX, 



Fig. 16.) 



This beetle is not uncommon in Colorado. I met with it at Blackhawk 

 and at Manitou. It probably bores in the pines and spruces of the mount- 

 ains. It is short and stout, reddish-brown, the head and prothorax 

 smooth and shining, though finely punctured, while the wing-covers are 

 coarsely punctured and dull-colored, being a little darker than the rest 

 of the body. Length, 0.35 inch. 



It scarcely differs from the Dendroctonus terebrans of the Eastern 

 States, which I have found in all stages in great abundance under the 

 bark of the white pine, associated with Pissodes strohi. It mines the 

 inner surface of the bark, slightly grooving the sap-wood, and pupates 

 in April, appearing as a beetle in great numbers on warm days early in 

 May. On a cursory examination I am nnable to see any difference be- 

 tween the eastern species and D. obesns, except that the latter is slightly 

 larger. 



INJURING DECIDUOUS SHADE AND ORNAMENTAL TREES. 



The following beetles are common in Colorado and the Rocky Mount- 

 ains, and in most cases will probably be found ere many years to be 

 injurious to the trees in towns and on farms. Knowing as yet nothing 

 of their habits I have thought it well to select a few of the more com- 

 mon species and present such figures and brief descriptions of them as 

 may prove useful to western gardeners and farmers hereafter. I will 

 not attempt to coin English names for them. The localities are given 

 in the List of Coleoptera collected by me in Colorado, at the end of this 

 report. 



Prionus emarginatus Say. (Plate LXX, Fig. 6.) 



"Body castaneous; head, thorax, and breast covered with long yellow- 

 ish-ferruginous hair; antennae fourteen-jointed, glabrous, perfoliate, im- 

 bricate; the imbrications emarginate beneath ; mandibles black at tip ; 

 thorax but slightly margined, one-toothed on the middle of the lateral 

 edge; angles obtusely rounded ; elytra somewhat unequal, punctured ; 

 feet and venter subglabrous. Length nearly seven-tenths of an inch. 

 Female glabrous ; antennas simple. Length four-fifths of an inch. This 

 species exhibits the general form of hrevicornis, but the thorax is pro- 

 portionally much narrowed, and the characters above detailed prove it 

 to be very distinct from that species. The lepaceous processes of the 

 antennae are so profoundly emarginate beneath as to appear each bilo- 

 bate. I obtained it on the Arkansas River near the mountains." — (Say.) 



