Dec, 'o6j ENTOMOLOGICAL NEWS. 373 



Wings broad, anal angle rectangular, auxiliary vein 

 ending in the costa at the middle of the wing, the 

 costa extends to the third longitudinal vein ; a black ellipti- 

 cal stigma surrounding the tip of the first vein ; joint origin of 

 the second and third veins arising nearer the humeral than the 

 anterior cross vein; third longitudinal vein furcate before the 

 middle of the first posterior cell : discal cell pentagonal, emit- 

 ting two posterior veins of which the anterior is furcate ; none 

 of the posterior veins attain the wing margin; all the basal 

 cells large, the discal cell small ; anal cell longer than the second 

 basal, its outer angle acute, anal vein reaching the wing 

 margin. 



Prorates claripennis no v. spec. 



Male. — Length, 3 mm. — Black over all, dorsum of thorax olivaceous, 

 with two fuscous vittas, pleura and occiput lightly 

 cinereous, abdomen not dusted. Occiput and ab- 

 domen with very fine pale scattered hairs. Legs 

 entirely black. Wings pure hyaline, the stigma 

 and veins blackish. Halteres black. 



Two males, collected by Mr. H. L,. 

 Viereck, at Highrolls, New Mexico, June 

 12 and 13, 1902. 



OCYDROMIIN^. 

 PARATHALASSIUS Mik. 



Prorates claripennis-*, The g enus Parathalassius was erected by 

 antenna. Professor Joseph Mik* for a small silvery- 



gray species collected on the sands near Venice, in May. 

 The species was found in a search for the Dolichopodid 

 Epithalassius, but it was not discovered until the col- 

 lected material was worked over, owing to a remarkable 

 resemblance between the two species. Only females of the 

 Empidid were taken, although apparently the species was very 

 common. 



In May of this year Professor J. M. Aldrich chanced on a 

 similar silvery-gray form sporting on the arid sands at Mon- 

 terey, California. Although no specimens of the European 



♦Wiener Entomologische Zeitung, X Jahrg., p. 216, 1891. 



