170 Annals Entomological Society of America [Vol. IV, 



There has been some uncertainty in regard to quadratus but 

 these specimens agree well with the original description. In 

 comparison with bastardii the color as a whole is lighter, the 

 palpi are clothed with mostly yellow hair instead of mostly 

 black hair, the wings are much nearer hyaline, the gray shadow 

 in the first submarginal cell is much narrower and the abdomen 

 has much more light hair. Weidemann's type is recorded as 

 from Georgia. 



Specimens are at hand from Cameron Parish, Louisiana. 



Promachus truquii Bellardi. 



Total length 24 to 36 millimeters. Mystax pale yellowish, beard 

 white, rear of the head with white hair, oecipito-orbital bristles mostly 

 black, palpi with many black hairs but beneath there are a number of 

 pale yellow ones; thorax brown pollinose, sides with white hairs, dorsum 

 with many short black hairs anteriorly and rather long white hair and 

 black bristles posteriorly ; legs in large part reddish brown with white hair 

 and black bristles, anterior side of each femur largely black; wings nearly 

 uniformly pale brownish, hardly as dark as in bastardii, gray shadow in 

 the first submarginal cell plainly evident and with distinct limits, about 

 a third as wide as the cell at the widest place. Abdomen brown pol- 

 linose on the venter and sides, black dorsally, uniformly clothed all 

 over with short white hair, no black hair except a few black bristles on 

 either side of the first segment. The hypopygium is furnished with 

 silvery hair above very much as in albifacies. 



The most apparent difference bewteen this and related 

 species is the uniform distribution of rather short white hair 

 over the abdomen and the absence of black hair except the 

 black bristles on the sides of the first segment. 



Several specimens from the Huachuca Mountains, Arizona. 

 Besides the species has been reported from several places in 

 Mexico. 



Promachus nigripes n. sp. 



Total length 2S to 32 millimeters. Mystax and beard white, rear 

 of the eyes with white hair, oecipito-orbital bristles largely black, palpi 

 black with numerous black hairs and a few white ones on the lower 

 side, antennae black. Thorax gray pollinose, mesothoracic dorsum 

 with the usual markings not conspicuous, clothed largely with black 

 hair and bristles, sides of the thorax with long gray hairs, scutcllum 

 with black hair and bristles; legs black, mainly with black hair and 

 bristles, but there may be some white hairs especially on the femora; 

 wings hyaline, no gray shadow in the first submarginal cell. Abdomen 

 from above banded with black and white, a white pollinose band clothed 

 with white hair on the posterior part of each segment and a wider 

 black hand clothed with black hair before it, venter and sides white 



