390 SCOLYTID^. 



[LeConte. 



Prosternal ridges indistinct ; beak cailnate, front 



not impressed ; color brown, elytra variegated 



with spots of pale scales, basal margin acute, 



subserrate 1. granulatus. 



2. Beak carinate ; basal margin of elytra subacute, 



subserrate 2. pinifex. 



Beak not carinate ; basal margin of elytra subacute, 



subserrate 3. rugipennis. 



Beak not carinate ; basal margin of elytra acute, 



serrate; alternateinterspaces more elevated be- 

 hind 4. subcostulatus. 



1. H. granulatus Lee, Tr. Am. Ent. Soc. 1868, 175 (Hylastes). 

 Oregon and California. The variegated spots of the elytra are formed of 



small pale scales, and were not apparent in the two specimens upon which 

 my description was based. Length 5 mm. ; .20 inch. 



2. H. pinifex Fitch, Noxious Ins. New York, 4th report, 43, No. 248 ; 

 XlJylaxtes); Lee, Tr. Am. Ent. Soc. 1868, 176. 



Lake Superior, Canada, Ohio. Length 5 mm. ; .20 inch. 



3. H. rugipennis Mann., Bull. Mosc. 1843, 297 {Hylurgus); ibid, 1853. 

 238 {Hylastes); Lee, loc. cit. 176 ; Chapuis, 1. c. 76. 



Alaska, Oregon and California. Length 4-4.5 mm.; .16-.18 inch. 



4. H. subcostulatus Mann., Bull. Mosc. 1853, 239. 



Oregon -and Sierra Nevada ; described by Mannerheim from Alaska. 

 Length 4 mm.; .16 inch. 



Hylastes rufipes Eichhoff, Berl. Ent. Zeitschr. 1868, 147; Chapuis, 1. c. 

 79, probably belongs to this genus, but is unknown to me. 



Hylastes cristatus Mann. , Bull. Mosc. 1853, 239, from Alaska, may also 

 belong here, but is unknown to me. 



SOIERUS n. g. 



I have separated under this generic name a species which agrees in gen- 

 eral form with Hylargops, but differs from it and Hylastes by the front coxse 

 being widely separated by the prosternum. The form of the third joint 

 of the tarsi is intermediate, it being not as deeply bilobed as in Hylur- 

 gops, but broader than in Hylastes. It agrees with both in the antennae, 

 which have the funicle 7-jointed, and the club ovate -pointed, with the first 

 joint smooth, shining, and nearly as long as the others united. The tibiae 

 are dilated and broadly serrate as in Hylastes; the terminal mucro is short. 

 The first and second ventral segments are equal, and the third and fourth 

 are shorter; the fifth is as long as the second. The other characters are 

 those of the tribe, and it is not necessary to repeat them. 



1. S. annectens, n. sp. 



Oblong cylindrical, dark br )wn, opaque, thinly clothed with very short 

 depressed yellow hairs. Beak flit, paactured and hairy, about twice 



