LeConte.] 



TOMICIXI. 351 



4. P. minutissimus. Toinicvs jnisillus\\Uarr\s, Trans. Xat. Hist. Soc. 

 Hartford, 83; Crypturgu><X min. Zimm., Trans. Am. Ent. Soc. 1868, 143 

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



rf . Head deeply concave, edges of concavity fringed with long, yellow, 

 silky hairs. 



9 • Head punctured, slightly hairy. 



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. Fi'ch is quite difterent, and is close'y allied to P. ramulorum Perris, 

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



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

 59; CryphaluH pub. Lee, Ti'ans. A.m. Ent. Soc. 1868, 156. 



(^. Head deeply concave; edge of tli3 concavity fringed with long silky 

 hairs. 



9. Head shining, sparsely hairy, punc'ured with an interocular tubercle. 

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



6. P. pilosulus. Cryphalus pit. Lee, Trans. Am. Ent. Soc. 1868, 156. 



9. Front flat, opaqu?, Avith a finely impressed median line. 



Middle Calitbrnia. 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 antenniB 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 tibiie 

 finely or feebly serrate in most si^ecics. 



1. Pygidium strongly inflexed, causing t'.ie fifth ventral 



segment to appear broadly emarginate 2. 



Pygidium but slightly visible from benea'h, fifth ven- 

 tral broadly rounded or subtruncate 4. 



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



nate , 3. 



Elytra retuse behind, each with two cusps; eyes not 



emarginate 7- carinulatus. 



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. 



