26 PROCEEDINGS OF THE NATIONAL MUSEUM vol.71 



to leave luctiiosa as a species separate from molaceipennis, for the 

 present, until more pairs have been captured and the evidence they 

 may give becomes available. 



Several abnormalities of wing venation have been noted in luduosa. 

 In one specimen of a left wing a vein stub from the middle of the 

 second transverse cubital runs a short distance into the second cubi- 

 tal cell and a similarly located stub projects outward from the third 

 transverse cubital vein; the right wing is normal. In another spec- 

 imen a similar stub on the third transverse cubital vein enters the 

 second cubital cell, while the other wing is normal. In another case 

 the left fore wing has a petiolated second transverse cubital vein, 

 but contrary to the condition in Miscus, the stalk is posterior and 

 the small, triangular, extra cell lies against the radial cell between 

 the second and third cubitals; the right wing is normal. One speci- 

 men shows the hinder part of the first discoidal cell almost ,cut off 

 from the rest by veins from the basal and first recurrent, which run 

 toward each other but do not quite meet. In still another example, 

 the extra vein starts toward the base of the wing from the first 

 recurrent, but soon forks, one fork continuing inward a short dis- 

 tance while the other turns sharply back and joins the discoidal vein 

 near where this and the first recurrent unite, producing a small cell 

 there. 



PODALONIA ARGENTIFRONS (Cresson) 



Ammophila argentifrons Cresson, Proc. Ent. Soe. Phila., vol. 4, p. 462, 1865. 



Male. 

 1 Ammophila mexicana Saussure, Reise d. Novara, Zool., vol. 2, pt. 1, Hym., p 



25, 1867. Female and male. 

 Psammophila argentifrons (Cresson) Melander & Brues, Biol. Bull., vol. 3. p. 



40, 1902. 

 Ammophila (Psammophila) luduosa (Smith) Melander, Psj'che, vol. 10, pp. 158, 



162, 1903. Male. 

 Psammophila luduosa (Smith) Mickel, Univ. Neb. Studies, vol. 17, p. 87, 1917. 



Male in part. 

 Psammophila luduosa (Smith) Carter, Can. Ent., vol. 57, p. 132, 1925. Male 



in part. 



Head, thorax, petiole, and legs black: abdomen blue or blue-black, 

 often brilliant, particularly in the female. Hairs black; frequently 

 brown, with the outer part white in the male; wings more or less 

 fuliginous, least so in the male. 



Female. — Here fii'st described, unless mexicana Saussure should 

 prove to be this species. 



Head: Considerably broader than thorax; clypeus broad, some- 

 what swollen, its front margin quite transverse, caused largely by a 

 broad, somewhat reflexed, smooth surfaced downward extension from 

 near the middle nearly out to the eyes, thus different from luduosa 

 where the margin is more rounded; surface rather sparsely, coarsely 



