42 MELANDER AND BRUES. 



PSAMMOPHILA PACIFICA, sp. HOV. 



Male. Length, 12 mm. Black shining, first, second and third abdom- 

 inal segments bright ferruginous. Clothed with very long pubescence which 

 is white upon the thorax and mixed with black upon the head, espe- 

 cially upon the vertex and face. Head sparsely punctate except around 

 ocelli where it is smooth. Antennae black, slender, moderately long. 

 Face and clypeus to above antennae silvery pubescent. Clypeus broadly 

 subtruncate. Mandibles indistinctly annulate with ferruginous. Eyes 

 strongly convergent below, reaching nearly to base of mandibles. Pro- 

 thorax and mesonotum sparsely coarsely punctured. Pleurae and sides of 

 metathorax coarsely and densely punctured. Scutellum strongly longi- 

 tudinally aciculate, the grooves widening out posteriorly to form a row of 



FORE-WING OF PSAMMOPHILA PACIFICA. 



pits along the posterior margin. Posterior face of metathorax finely trans- 

 versely aciculate. Coxae black, clothed with long white hairs which also 

 extend to bases of femora. Tarsi slightly tinged with fuscous, thinly white 

 pollinose. Abdominal petiole black, white pilose anteriorly. Abdomen 

 very slender, first, second and third segments bright ferruginous, remainder 

 shining black. External genital organs fuscous. Their lamellae with 

 several stiff bristles interiorly and a brush of hairs externally. Anterior 

 wings hyaline, brownish at tip, posterior one hyaline. Marginal cell ex- 

 tending far beyond third submarginal cell, which is less than half as large 

 as the second and barrel-shaped. 



Described from a male specimen collected by Miss Rose Patter- 

 son at Pacific Grove, California, July 9, 1897. 



This species may be readily recognized by the venation of the 

 wings, the strongly convergent eyes, white pubescence and very 

 slender form. 



1. P. valida Cress. 21 mm. Colo. 



2. P. grossa Cress. 22-24 rnm. Texas. 



3. P. lucluosa Sm. 17 mm. U. S. 



4. P. argentifrons Cress. I 3~ I 5 rnm. Colo., N. Mex. 



5. P. communii Cress. 12.5-18 mm. Colo., 111., N. Mex., Mass. 



6. P. pacifica, sp. nov. 12 mm. Cal. 



7. P (?) violaceipennis St. Farg. 21 mm. Philadelphia, Pa. 



