FAMILY iv. SCOLYTIDJS. 



the insects that the pattern of the larval burrow was confused." 

 (Packard, IS!)!).) 



912 (9148). SCOLYTUS MUTICUS Say, 1824, 323; ibid, II, 182. 



Elytra clothed with long, fine, erect hairs and with numerous rows 

 of strong distant punctures. Male, head broad and flat in front and thickly 

 fringed with long yellow hairs. Last abdominal segment with two tufts 

 of long hair near the posterior margin. Female, head narrow, with im- 

 pressed longitudinal line in front and with only a few long hairs. Last 

 abdominal segment without tufts of hair. Length 3.8 mm. 



Marion County, Ind., rare; June 4: beneath bark of hackberry. 

 Ranges from New Jersey to Missouri. Food plant, Celt is occiden- 

 tal!* L. Mines in bark and wood of felled and dead trees and 

 dead branches of living trees ; adults May 2 in West Virginia. 

 (HofkiiiN.) Wenzel has it from hickory. 



913 (9151). SCOLYTUS SULCATUS Lee., 18G8, 167. 



Blackish, elytra, antenna? and feet yellowish-brown. Head longitudin- 

 ally aciculate, flattened, slightly hairy. Prothorax not longer than wide, 

 strongly narrowed in front, very feebly rounded on the sides, finely, not 

 densely punctured, more distinctly at the sides. Elytra nearly glabrous 

 with punctures of rows and intervals almost equal in size and distance, 

 not larger toward base, but alternately very slightly larger; disc with a 

 few short yellow hairs toward sides and tip, the tip, as usual, rugosely 

 punctured. Venter not densely punctured, anterior part of declivity 

 prominent, subacute; second ventral segment not tuberculate; posterior 

 margin of segments smooth and somewhat elevated. Seems to resemble 

 the European S. rugulosus. Length 3.7 mm. 



Described from New York: one female. Not named by Smith. 

 Food plant unknown. Apparently unrecognized since its descrip- 

 tion by LeConte. 



914 (9153). SCOLYTUS RUGULOSUS Ratz., 1837, 187. 



Subopaque, blackish, antenna?, tibiae, tarsi and apex of elytra reddish- 

 brown. Prothorax longer than wide, densely, strongly punctate, punc- 



Fig. 144. a, Adult beetle; />, same in profile : c. pupa; rf. larva. All X 

 10. (After Ciiittenden.) 



tures deep and confluent at sides, smaller and oblong on the disc. Elytra 

 longer than thorax, attenuate, striae and interspaces strongly and densely 



