1911] Promachus and Proctacanthus 1(>7 



Three males and three females from southern Arizona, in 

 July and August, some of them collected by the late Dr. F. H. 

 Snow. 



Osten Sacken's specimens were procured in northern Sonora, 

 Mexico, by Morrison. In a note after his description he men- 

 tioned Promachus trapezoidalis Bellardi as closely related, but 

 Williston has shown, rightly I think, that the latter belongs to 

 Mallophora. I have seen a male of this from Brownsville, 

 Texas. Bellardi mentions the blunt claws and Williston calls 

 attention to the same character. 



Promachus forfex Osten Sacken. 



This is a new name for Promachus quadratus Bellardi, 

 since there is an older quadratus by Wiedemann. 



Total length 23 to 30 millimeters. Mystax largely composed of 

 yellow hair, but a few of the finer ones are black, antennae and pro- 

 boscis black, palpi with black hair, occipito-orbital bristles black. 

 Thorax sparsely gray pollinose with the usual darker markings dorsally, 

 scutellum with two more or less irregular rows of black bristles and 

 numerous shorter yellow hairs; wings uniformly yellowish brown, dis- 

 tinctly darker than in sackeni, cloud in the first submarginal cell two- 

 thirds as wide as the cell, dark colored and with a distinct outline; 

 femora, tips of the tibiae and tarsi, including the claws pure black, 

 remainder of tibiae and pulvilli yellow, balancers pale yellow; abdomen 

 largely clothed with light yellow hair, sides and narrow posterior mar- 

 gins of the first five segments in the female and seven in the male gray 

 pollinose leaving a large quadrate dark marking above on each of the 

 segments. Ovipositor composed of three segments, shining black; 

 hypopygium black with black hair, from dorsal view gradually widened 

 toward the apex where it is plainly truncate. 



Male and female from Cordoba and a female from Vera- 

 cruz in Mexico, collected by D. L. Crawford. Also a female 

 from Puerto Barrios, Guatemala, collected by E. B. Williamson. 

 The species appears to be southern in distribution and is not 

 likely to be taken in the United States. 



Promachus fitchii Osten Sacken. 



Fitch described this species under the name apivora because 

 he found it injurious to bees. His name could not stand, how- 

 ever, as it had been used before in the genus. 



Total length 25 to 30 millimeters. Mystax, beard and hairs of the 

 palpi distinctly yellow, occipito-orbital bristles pale yellow intermixed 

 with black ones which are more numerous in some specimens than in 

 others. Thorax yellowish brown pollinose above with short black 



