LeConte.] 



TOMicixr. 351 



4. P. minutissimus. Tomicus pusilluslHarns, Trans. Nat. Hist. Soc. 

 Hartford, 83; Crypturgiti-X min. Zimni., Trans. Am. Ent. Soc. 1868, 14:^ 

 (nee Fitch, N. York Reports on noxious Ins. iv. No. 245). 



c^. Head deeply concave, edges of concavity fringed witli long, j'ellow, 

 silky hairs. 



9- Head punctured, slightly hairj'. 



Middle and Southern States. Length 1.8 mm.; .C7 inch. If the name 

 T. pusillus II is to be cited under any species it must be for this, which 

 agrees very well with the description of Dr. Harris, That mentioned by 

 Dr. Fitch is quite different, and is closely allied to P. raviulorum Perris, 

 which is considered by EichhofF as the same with typograplms Ratz. 



5. P. pubipennis. Tomicus puh. Lee, Pac. R.R. Expl. and Surv. Ins. 

 59; Cryphalus pub. Lee, Trans. Am. Ent. Soc. 1868, 156. 



(^. Head deeply concave; edge of the concavity fringed with long silky 

 hairs. 



9. Head shining, sparsely hairy, punctured with an interocular tubercle. 

 San Jose, California; the longer hairs of the elytra are arranged in rows. 



6. P. pilosulus. Cryphalus pil. Lee, Trans. Am. Ent. Soc. 1868, 156?f 

 J'? 



9 . Front flat, opaque, with a finely impressed median line. 



Middle California. I have but two specimens, and in one the head is re- 

 tracted upwards so that no part of the upper surface is visible. Length 2 

 mm.; .08 inch. 



C. Club of antennae distinctly annulated and pubescent on both sides, 

 not fringed with long hair. Hairs of body slender, verticellate and ser- 

 rate, especially on the head and prothorax. Prothorax asperate in front, 

 punctured behind. Elytra punctured, sparsely pubescent. Front tibia; 

 finely or feebly serrate in most species. 



1. Pygidium strongly inflexed, causing the fifth ventral 



segment to appear broadly emarginate 2. 



Pygidium but slightly visible from beneath, fifth ven- 

 tral broadly rounded or subtruncate 4. 



2. Elytra refuse behind, without cusps; eyes emargi- 



nate 3. 



Elytra retuse behind, each with two cusps; eyes not 



emarginate 7. carinulatus. 



7. Elytra with coarse punctures arranged somewhat in 



rows 8. pullus. 



Smaller and stouter, elytra with large punctures not 



arranged in rows 9. pulicarius. 



4. Elytra retuse behind, and concave along the suture. 6. 



" not retuse on posterior declivity 7. 



