KAMU.Y CKRAMBYCm.t. 133 



MoNociiAMUs TiTiLi.ATou. ( IMiit*' xvi. lifj;. b.) 



BrownUli, mottled with gray spots. Klytni tufltd with jiatchcs of dark hn.wn hairs : an- 

 tenna?, in the male, twice as long as the Imdy ; in the feiiiah', they (••jtial it in length. 

 Length one ineh and more. 

 The middle leg has a protuberance on the upper side. The inottlings are somewhat 

 variable, owing in part to the removal of the short closf- nap that covers the insect. 



MoNOCUAMlIS MACI'LOSIS. 



Color blackish brown. Elytra mottled and furnished with small patches of rai^^>d sj-ots 



tufted with hair, rather n^arsely immlured : apex, on the inner side, arm* d with a 



spine; outer angle rounded : pmtubirancoofthe tibiic one-thinl the length from the 



tarsi. It is rather smaller than the litillator. 



The two foregoing species are rather common in Albany county : indeed, common to 



New-York and New-England. 



MONOCHAMUS SCUTELLATUS. 



Color dark brown, darker upon the base of the elytra. Seutel white, hairy, strongly punc- 

 tured : punctures confluent at the base. Antenna and legs dark brown. 



MONOCIIAMUS PULCHEK. 



Color lighter brown than the scu/€//o/»«. Thorax and elytra variegat«d with patches of 

 white nap. 



Oncideres cingulatus ( Serv.). ( Plate xxii, lig. 1.) 



Ash-gray, banded : head inclining to brown : thorax ash, together with the middle of the 

 elytra ; base and terminal extremity darker, and somewhat mottled. Length six- 

 tenths of an inch. 

 Dr. Halde.man remarks', that ' this insect appeai-s in Pennsj Ivania during the last two 

 weeks in August and first week in September. It feeds upon the bark of the walnut {('ory<i 

 alba). The ova are a Ime and a half long, and are deposited in excavations in the small 

 limbs. After the ova are deposited, the female gnaws a groove around the limb, which 

 consequently dies in a short lime : this seems to be intended for the future progeny, as 

 the larva; are found feeding upon the dead wood. When the ini^ect is abundant, much 

 damage may be done to the young growth of the hickory, when it is of the size suitable 

 for hoop-poles.' When the main stem is girdled by the insect, a lateral shoot appears, that 

 may be attacked the next year, to be in its turn amputated after undergoing the same 

 oper.ition : in a few years, the tree presents a curious appearance. 



• Jour, .\cad.Nat. Sci. PhiUiilcliiliia; llAinrsiAX, Am. Pliil. Transaclioim, .^, 62. 



