STATE AGRICULTURAL SOCIETY. 
367 
CIIERRY. TRUNK. 
72. Spotted iiorn-bug, Dynastes Tityus, Linn. (Colcoptera. Scarabseidce.) 
In old decaying trees, a very large grub, like those of the last 
named species, producing a beetle two inches in length, of a shin¬ 
ing pale olive color, its wing covers with round black spots or 
dots, the males having the middle of the thorax prolonged for¬ 
wards in a long black horn which is hairy along its under side 
and commonly notched at its tip, as if to receive the sharp point 
of another similar horn which curves upwards from the crown of 
the head; two other horns between these, short and sharp pointed, 
one upon each side. This large beetle is frequently met with at 
the south and I have specimens of it from Pennsylvania, but 
know not of its ever being found in New-York. Mr. Say men¬ 
tions possessing a specimen having the wing covers chestnut brown 
and without spots, and I have a female in which the whole of the 
thorax is black. But probably the most remarkable specimen 
which has ever been discovered was captured west of Arkansas 
by Rev. R. M. Loughridge and presented to the entomological 
cabinet of the N. Y. State Agric. Society. This is a male having 
the left wing cover black and without spots, whilst the right wing 
cover and thorax is pale olive yellow. 
73. Dog-day Cicada, Cicada tibicen, Linn. (Ilomoptera. Cicadidoo.) 
In August and September, wounding the small limbs to deposit 
its eggs therein, a large black fly with four clear glassy wings 
having a green rib, its head and thorax with olive green spots and 
marks, and its under side coated w r ith a white meal-like powder. 
Length 1.60 to 2.00. The pruinosa , Say, is this same species, 
with the white mealy powder not rubbed off as it frequently is in 
old specimens. The canicularis , Harris, are merely small sized 
individuals of the pruinosa The valves at the base of the abdo¬ 
men in the males vary in their length both in large and small 
individuals, and therefore furnish no valid mark, as Dr. Harris 
supposed, whereby his species can be distinguished. The speci¬ 
mens found in the State of New-York are of the smaller size, this 
being the northern limit of the geographical range of this species. 
It extends from hence south to Brazil. In Surinam, according to 
Madam Merian, it is most common in the coffee plantations, the 
trees of which are sometimes killed by the wounds which the 
