62 BULLETIN BROOKLYN ENTOM. SOC. VOL. V. ~— November 1882. ] 
‘ 
DORCUS, 4 Leap. 
5, parallelus, Say. Journ. Ac. Phila. III, 248, var. costafus, Lec. Proc. 
Ac. Phila. 1856, p. 380, var. ¢reves, Say, Journ. Ac. Phila. V, 202; par 
allelepipedus, Voet. Col. Il. p. 37, t. 30, £ 7. (Voet. schoenh_ Syn. ins: 
I, 3. p. 326.) D. parall-lus, varyinz very much in size from 15 to 26 
mm, has the elytra deeply striate and punctate, the strize in the 9 O deep- 
er, the mentum in the ({\ strongly transversely striate, in the Q variolose 
rugose; the anterior tibia are more serrate than those of the Lucan; cos/a- 
tus, Lec. has the striae more obliterated. 
Regarding the variety of drews Say, there is still considerable differ- 
ence of opinion as to whether it really is entitled to rank as a species. It 
differs from parallelus in the smooth elytra, and the remarkable develop- 
ment of the head and thorax: the head being broader and nearly as long 
as the thorax, though the mandibles are not in proportion to this devel- 
opment. The insect is exceedingly rare, and while I am inclined to believe 
in its specific distinctness from paradlelus, Dr. Horn strongly insists that 
it is only a variety, basing his opinion upon analogous variations observ- 
ed in foreign species, In deference to his opinions based on a wider ac- 
quaintance with the family than we can boast cf, drevis is here brought in 
as a variety. All the specimens of this variety have been found iu New 
Jersey so far as we have been informed. This would seem to make it, if 
a variety at all an exceedingly local one, and curious and interesting for 
that reason. Mr. Charles Wilt of Philadelphia has a fine set of four 
beautiful specimens. 
The antennz are peculiar: joint 1 to 5, as usual glab- 
rous; joint 6 glabrous and scmewhat dilated, joint 7 glab- 
rous, and only slightly prolonged inwardly, joint 8 acutely 
orolonged, prolongation only pubescent, opaque, joint 9 
with prolongation only pubescent, form as shown in figure, 
joint 10 spherical entirely pubescent, - The mode of affixion to the pedicle 
is different from that of any other in the group, and a very decided groove 
extending longitudinally on the inner and upper side would seem to indi- 
cate that the clavicle was or could be folded upon it. 
\ The larve live in lime trees and sugar maple and develop during 
{July and August. The pupe of the ov have a spiral appendage 
between the anal fork, see fig.5a. Foundin N. Y., S. C,, 
Tenn., Md., Penn. Length 15-26 mm. 
