INSECTS INJURIOUS TO THE SPRUCE. . Zot 
numbers with several pup under the bark of the spruce at Brunswick, 
August 22, and under another tree, observed August 27, there were many 
pup, and numerous pale beetles en had only a deat cast off their 
pupal skins. There wereall stages between very pale beetles and the dark, 
black-brown fully mature beetles; some with a short, broad dark stripe 
oneach wing-cover; this might be thoughtat first sightadifferent species, 
and indeed it is probable that from variations in age and size, too many 
species of these bark-borers have been described. 
Leconte states that the genus Xyleborus has “the body stout, cylindri- 
cal; declivity of elytra oblique, scarcely flattened; funicle of antennee 
with four distinct joints; tibize finely serrate on fie distal half of their 
length and rounded at tip.” X. celatus ranges from Canada to Texas 
and California. In this species “the declivities of the elytra at the end 
of the body are with two prominent tubercles, and some smaller margi- 
nal ones; elytra strongly punctured in rows; interspaces with rows of 
distant punctures.” (Identified by Dr. Horn.) 
8. THE LEAST SPRUCE BARK-BORER. 
Crypturgus atomus Leconte. 
Order COLEOPTERA; family SCOLYTID. 
This minute bark-borer, though often occurring in white pine bark, 
must not be confounded with Pityophthorus puberulus of the white pine 
‘ (p. 172), as its burrow is very different. The present species is 1.3™™ 
long, and 2™™ in diameter. The mine consists of a short sinuous pri- 
mary gallery about $ inch long, which gives off at intervals about ten 
short secondary galleries from ack side, but they are not made in the 
same plane, next to the sap-wood as in P. puberulus, but penetrate only 
the bark itself in all directions, so that no regular pattern is formed. 
The beetle is extremely numerous, a great many dense mines being 
situated within a square inch of surface. They were observed in great 
profusion in the larva, pupa, and beetle states at Brunswick, Me., dur- 
ing August; in standing dead trees as well as spruce stumps; also in 
white pine stumps. Many of our observations on this and the foregoing 
species, as well as the Rhagium, were made by the side of Maquoit 
street, Brunswick, on land from which timber was felled, as we were 
informed, in.November, 1880, so that the period during which the in- 
sects had been at work was known quite exactly. 
This species has been kindly identified for us by Dr. John L. Leconte, 
of Philadelphia, who has also prepared the following description, which 
is much more complete than the original description in the Transactions 
of the American Entomological Society. 
The beetle.—Slender, dark piceous, shining, prothorax distinctly longer than wide, 
sparsely and coatsely punctured ; elytra very finely not densely pubescent, striae com- 
posed of shallow punctures, interspaces as well as the strie without distinct punctu- 
lation. Length 1™™-+. Head with a broad short beak, slightly convex, finely not 
densely punctulate. Prothorax distinctly longer than wide, slightly rounded on the 
