LeConte.] 



ALOPIIID^. 119 



the second joint of the funiculus is a little longer than the first, as in 

 Alophus, and in all other respects it agrees with that genus,* The head and 

 prothorax are densely punctured, the latter usually channeled and carinate,, 

 the anterior transverse impression strong, sometimes extending on the dor- 

 sal surface; the elytra are densely but more finely punctured; the tarsi are 

 broad and scopiferous as usual. 



The species may be thus distinguished : 

 Pronotum strongly transversely impressed near the tip; 

 dorsal channel strong in front, carinate behind: 



Pronotum less coarsely punctured 1. didymus. 



Pronotum more coarsely punctured 2. constrictus. 



Pronotum scarcely impressed near the tip: 

 Lateral groove of rostrum distinct; pronotum carinate 

 about the middle : 



Elytral strife nearl}' obliterated 3. alternatus. 



Elytral striae distinct 4. seriatus. 



Lateral groove of rostrum triangular feeble; pronotum 

 neither channeled nor carinate; elytral striae 



wanting 5. simplex. 



The bibliography and localities as follows: 



1. T. didymus (Lee), Proc. Ac. Nat. Sc. Phila. vii., 20, {Alophus;) 

 Pacific R. W. Expl. and Surv. Insects, p. 54. 

 Oregon. 



3. T. constrictus (Lee), ibid. {Alophus); ibid.j; A.alteniahtsX'^l-Ann., 

 Bull. Mosc. 1843, 290; ib. 1853, 244. 



Alaska and Washington Territory. This is very similar to the preceding 

 and may with larger series of specimens prove only a race thereof. The 

 prothorax, however, seems more coarsely punctured, and consequently sub- 

 serrate at the sides. 



3. T. alternatus. Hypsonotus altern. Say, Cure, 10; ed. Lee. i., 271 ; 

 Alophus altern. Boh., Schonk. Cure, ii., 28G. 



Lake Superior. 



4. T. seriatus (Mann.), Bull. Mosc. 1853, 245, {Alophus). 

 Alaska. 



5. T. simplex, n. sp. 



Brownish black, clothed with pale brown prostrate pubescence ; head, 

 beak and prothorax densely not coarsely punctured, the latter with a stripe 

 of denser pubescence each side, elytra more finely densely punctured. 

 Length, 8.5 mm.; .32 inch. 



Manitoba and Hudson Bay Territory. Smaller than the other species, 

 and easily known by the lateral groove of the beak being shorter, broader, 

 triangular and feebly impressed. The outer two striae of the elytra are 

 distinct, the others obliterated; the pubescence becomes squamiform on the 

 sides of the prothorax beneath, and on the side pieces of the meso- and 

 metasternum, as in the other species of the genus. 



*In Alophus the lateral groove is wanting. 



