FAMILY CERAMBYCID-C 123 



MoNociiAMis titillator. ( Plate xvi, fig. 5.) 



Brownish, mottled with gray spots. Elytra tufted with patches of dark brown hairs : an- 

 tennae, in the male, twice as long as the body : in the female, they equal it in length. 

 Length one inch and more. 

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

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



MoNOCHAMl'S MACVLOSUS. 



Color blackish brown. Elytra mottled and furnished with small patches of raised sjote 



tufted with hair, rather coarsely punctured : apex, on the inner side, armed with a 



spine ; outer angle rounded : protuberance of the tibia? one-third the length from the 



tarsi. It is rather smaller than the titillator. 



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



New-York and New-England. - 



MoNOCHAMUS SCUTELLATCS. 



Color dark brown, darker up >n the base of the elytra. Scutel white, hairy, strongly punc- 

 tured : punctures conlluent at the base. Antennae and legs dark brown. 



MoNOCHAMUS PULCHER. 



Color lighter brown than the scutellatus. Thorax and elytra variegated with patches of 

 white nap. 



Oncideres cingulatcs ( Serv.). (Plate xxii, fig. 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. Haldf.max remarks", that ' this insect appears in Pennsylvania during the last two 

 weeks in August and first week in September. It feeds upon the bark of the walnut (Carya 

 alba). The ova are a line 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 time : this seems to be intended for the future progeny, as 

 the larvse are found feeding upon the dead wood. When the insect 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 

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



• Jou- A.ea<1. Nat. Sci. Philadelphia; Haldemas, Am. Phil. Transactions, t, 52. 



