378 SCOLYTID^. [LeConte. 



group, but is not apparent in the preceding groups or tribes ; tlie 

 mandibles are stronger, nearly flat above, and the labrum is obsolete; these 

 characters indicate a recurrence towards the normal Rhynchophora. The 

 funicle of the antennae is 5-7 -jointed; the first joint stout, the others slender, 

 closely united; the club is very slightly compressed, annulated and pubes- 

 cent, oval-pointed in Hylesinus, circular, compressed, nearly glabrous, with 

 transverse sutures in Dendroctonus. The ventral segments are convex, 

 nearly equal; the first and fifth somewhat longer, the sutures deep and 

 straight. The tibiae are dilated, and strongly toothed except in Cnesimus, 

 where they are not serrate; the third joint of the tarsi is usually bilobed, 

 and the fourth very small; the fifth long with divergent simple claws. 



The basal margin of the elytra is elevated and acute as in the two preced- 

 ing groups, and the protliorax is narrowed from the base forwards. 

 Funicle 7jointed 2. 



" 6-jointed BLASTOPHAGUS. 



" 5-jointed 4. 



2. Tibiae with few teeth; protliorax strigose longi- 



tudinally, anterior coxae widely separated; 



club elongate-oval, compressed CNESINUS. 



Tibia? serrate; club elongate-oval, pointed, not 



compressed HYLESINUS. 



3. Club oval, obtusely pointed; first joint of tarsi 



not shorter; outer joints of funicle much 



broader PHLCEOSINUS. 



Outer joints of funicle scarcely broader CH^TOPHLCEUS. 



Club oval-elongate; first joint of tarsi short CARPHOBORUS. 



" circular, compressed; first joint of tarsi not 



shorter DENDROCTONUS. 



CNESINUS Lee. 

 NemopMlus Chapuis. 



I have already sufllciently described this remarkable genus, which is at 

 once known by the widely separated front coxte, and the longitudinally 

 aciculate protliorax. Dr. Chapuis is in error in describing the tibiae as 

 "extus integerrimae;" the front tibiae have three acute teeth directed back- 

 wards, of which the third is apical, and the others near the apex; the 

 outer apical angle of the middle tibiae is produced, and emarginate at tip. 

 The third joint of the tarsi is visible but not conspicuously emarginate; the 

 joints 1-3 are rather stout, nearly equal, and the fifth is shorter than the 

 others united. 



1. O. strigicollis Lee, Tr. Am. Ent Soc. 1868, 171; NemopMlus stri- 

 giUatus Chapuis, Mem. Soc. Roy. Sc. Liege, 1869, 27. 



Illinois and South Carolina; also in Texas, according to Chapuis. Length 



3 mm.; .11 inch. 



HYLESINUS Fabr. 



This genus represents the first division of my memoir, above cited, and 

 contains those species in which the funicle is composed of seven distinct 



