NEW SPECIES OF HYMENOPTERA. 4! 



Petiole much longer, smaller and more slender species 8 



6. " Wings black, violaceous, dilated part of petiole, second abdominal segment, and 



anterior border of third, ferruginous" 7 violaceipennis St. Farg. 



Wings much lighter, petiole black 7 



7. Petiole short, not extending beyond posterior trochanters, stout species. 



2 grossa Cress. , 9 

 Petiole extending far beyond trochanters, slender species. 



5 communis Cress., $ , > . 



8. Third submarginal cell small, barrel -shaped, eyes strongly convergent below. 



6 pacifica, sp. nov. 



Third submarginal not barrel -shaped, eyes only slightly convergent, pubescence 

 often dark 6 communis Cress., $ . 



PSAMMOPHILA GROSSA Cresson. 



Male. Length, 22-24 mm. Wholly black, except ferruginous band on 

 mandibles ; second abdominal segment below ; and narrow bands on third 

 and fourth segments anteriorly above, dilating on the sides and coalescent 

 below ; ferruginous ; so that second to sixth ventral segments are ferrugi- 

 nous. The dorsal segments also show faint ferruginous bands posteriorly 

 on second to sixth segments, diminishing posteriorly ; while in one specimen 

 the black is considerably reduced, until the second and third segments are 

 almost wholly ferruginous. Clypeus and face to considerably above an- 

 tennae silvery pubesent. Head, thorax and coxae bearing long cinereous 

 hairs. Legs white pollinose in certain lights and abdomen slightly so. 

 Clypeus subtruncate, narrowly margined and not dentate ; flat below, 

 slightly convex above. Antennae slightly attenuated toward tip, the apical 

 eight joints each with a sharp carina inwardly. Head very sparsely and 

 rather coarsely punctured. Dorsulum more densely and coarsely punc- 

 tured. Mesothorax with a short sharp groove anteriorly. Mesopleurse 

 more densely and coarsely punctate. Metathorax obliquely aciculate on 

 the sides, rugose reticulate dorsally, Legs and abdomen very stout, legs 

 with black spines. Wings light brown, with a violaceous tinge, darker on 

 exterior border. Third submarginal cell oblique, narrowed above. Second 

 submarginal cell receiving the recurrent nervures just before the middle and 

 apex. 



Described from two specimens collected at Austin, Texas, 

 during May, 1900. 



Although the males differ by their white pubescence from the 

 female described by Cresson, there seems to be no doubt as to 

 their identity, as most specimens of communis present the same 

 white pubescence in the males and not in the females. Other 

 specimens of communis <? collected in Illinois have the pubes- 

 cence wholly or partially black. 



