STATE AGRICULTURAL SOCIETY. 367 



CHEKRT. TRUNK. 



72. Spotted horn-bug, Dynastes Tityus, Linn. (Colcoptera. Scarabajidix}.) 



In old decaying trees, a very large grub, like those of the last 

 named species, producing a l>eetle 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 fbr- 

 w^ards 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 wiiole of tlie 

 thorax is black. Eut 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. 



7*3. Dog-day Cicada, Cicada tibicen, Linn. (Ilomoptera. CicadiJae.) 



In August and September, wounding the small limbs to deposit 

 its eggs therein, a large l)lack 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 with a wliite meal-like j^owder. 

 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. Tlie canicularisj 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 S'nall 

 individuals, and tlierefore 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 geoi:^rapliical range of this species. 

 It extends from hence south to Ijrazil. In Surinam, according to 

 Madam Merian, it is most common in tlie cotfee i)lantati»)ns, the 

 trees of which arc sometimes killed by the wounds which the 



