1865.] 389 



large ; marginal cell short, obliquely truncate at tip ; three distinct 

 submarginal cells, the first long and narrow, nearly as long as the stigma 

 and marginal cell taken together; the second longitudinally subtrian- 

 gular, much narrowed towards the base of the wing, and continued be- 

 neath the first submarginal to near its base, receiving the first recurrent 

 nervure beyond the middle; third submarginal very short, narrow, 

 transversely quadrate, receiving the second recurrent nervure at the 

 apex. Legs fulvo-testaceous, clothed with pale yellowish pubescence, 

 quite dense on the tibiae and tarsi. Abdomen elongate, sparsely punc- 

 tured, shining, the puncture becoming finer and less distinct towards 

 the apex, the pubescence on the basal segments short and thin, longer 

 and thicker on the apical segments ; first segment large and much 

 swollen, with a short peduncle, the segment nearly as broad as the se- 

 cond, the apical margin constricted; last ventral segment with a long, 

 acute, recurved spine. Length 6 lines; expanse of wings 10$ lines. 



Hub. — Cape St. Lucas, Lower California. Mr. H. Ulke. (Coll. 

 Ent. Soc. Philad.) 



One specimen. This may be distinguished by the uniform dark 

 chestnut-brown color, the elongate abdomen, and the singular neuration 

 of the wings. 



7. Mutilla unicolor, n. sp. 



Pale honey-yellow, with bright yellow pubescence : metathorax, legs and 

 base of abdomen with whitish pubescence; wings yellowish-hyaline, varied 

 with pale fuscous: two submarginal cells; abdomen elongate, yellowish at tip. 



Male. — Uniform pale honey -yellow; head rather large, polished, with 

 fiue scattered punctures, and long, thin, yellowish hairs; eyes very 

 large and prominent, slightly emarginate behind; ocelli also large; face 

 much depressed beneath the antennae; tips of mandibles black; antennas 

 not quite as long as the head and thorax, luteous-yellow, the flagellum 

 opaque. Thorax densely and deeply punctured, clothed with a long, 

 thin, yellowish pubescence; mesothorax with four longitudinal, im- 

 pressed lines, the lateral one abbreviated before; metathorax rounded 

 above, rather abrupt on the sides and behind, coarsely reticulated, and 

 clothed with a long, thin, whitish pubescence. Wings large, yellowish- 

 hyaline, slightly varied with pale fuscous, the largest and darkest mark 

 being on the posterior margin beneath the stigma; nervures yellowish, 

 stigma fulvous ; marginal cell moderately long, the lower nervure gra- 

 dually curved to the apex which is somewhat pointed; two submarginal 

 cells, the first narrow and elongate, the second rather large and sub- 

 quadrate, receiving the first recurrent nervure before the middle, the 

 basal nervure angular. Legs color of the body, tibiae and tarsi paler, 



