30 GEO. H. HORN.. 



PSEPHENUS, Hald. 

 Psephenus Hald. Melsheimer Catalogue, p. 34. 

 Eury-palpus. Lee. Proc. Acad. 1852, p. 41. 



P. Lecontei, Lee {Eurypalpus) loc. cit; trentonensis Zimm. Trans. Ent. Soc- 

 1869, p. 259. 



The male has the thorax much less opaque than the female, some- 

 times brownish black in color, in the latter sex the thorax is always 

 deep black and without lustre ; the elytra vary in color from black to 

 brownish. The P. trentonensis, Zimm., is not distinct from the other, 

 and Dr. Leconte informs me that he published the description of Dr. 

 Zimmerman's in deference only to the very positive opinion of its au- 

 thor, having doubts in his own mind of its being distinct. Length 

 .18.-24 inch; 4.5—6 mm. 



Occurs abundantly at Niagara and Trenton Falls, and specimens 

 have been received from Illinois, Rhode Island and Pennsylvania. 

 P. Haldemani, n. sp. 



Similar to Lecontei and differs in being more depressed and with 

 less distinctly punctured elytra the bases of which have a brownish 

 testaceous space extending from the humeri to the suture, where it is 

 broader. The head, instead of being concave, as in the preceding spe- 

 cies, has two impressions, as if the cavity in the preceding species were 

 divided by a longitudinal obtuse ridge. The femora are yellowish 

 and the tibiae and tarsi brownish. 



Length .15 inch; 3.75 mm. 



Two females from the Peninsula of California, collected by Mr. 

 Gabb. 



Sub-Family Parnid^. 

 Two tribes form this sub-family. 



Head not entirely retractile, free beneath Larini. 



Head retractile, protected beneath by prosternal lobe Parniai. 



Tribe I. — Larini. 

 Two genera are included in this tribe, one of which is Californian, 

 the other European. 



LARA, Lee. 

 Lara, Lee. Proc. Acad. 1852, p. 42. 



L. avara, Lee. loc. cit. 



Sufficiently detailed generic and specific descriptions have been 

 given by Leconte (loc. cit. and Class Col. JV. A., -p. 116), and it is 

 unnecessary to add anything further. Length .30 inch ; 7.5 mm. 



From the circumstances attending the reception of this insect I am 

 inclined to believe that the high mountain regions of the upper Sacra- 



