1919] Hine: Genus Erax 111 



This species looks like aestuans but the wing venation, color 

 of the legs and the male genitalia characterize it. It is the 

 only species of its group with the femora reddish brown at the 

 apexes although some specimens do not show the character 

 very plainly. 



Erax cingulatus Bellardi. 



Total length 20 to 25 millimeters. Male. Mystax largely black, 

 but intermixed with pale yellowish hairs; beard pale yellowish; palpi 

 with numerous black bristly hairs. Much of the thorax and abdomen 

 brownish pollinose, thorax with a wide mid-dorsal stripe and spots on 

 either side black, vestiture mostly black, but a few pale hairs posteriorly, 

 scutellum and extending to the posterior part of the mesothorax ash 

 gray, conspicuously contrasting in color with the rest of the thorax, 

 wings tinted with brownish, costa very slightly dilated, furcation of the 

 third vein distinctly beyond the base of second posterior cell, stump 

 shorter than the basal section, three-fourths or more of tibiae from bases, 

 pale yellowish, .otherwise legs black, except some of the basal tibial 

 segments which are dark brown. vSome of the bristles of the legs are 

 pale in some specimens, but most of them are black, abdominal segments 

 two, three, four and five black anteriorly and pale brownish pollinose 

 posteriorly, the divisions between the colors irregular and not sharply 

 defined, segments six and seven silvery. Hypopygium black with 

 black vestiture, rather large. Figure 34. 



Female colored like the male except abdominal segments six and 

 seven are like those that precede them. Ovipositor black, slightly 

 longer than the last three abdominal segments. 



Seven specimens from Cuernavaca, Mexico, collected by 

 D. L. Crawford. 



The ash-colored scutellum and space before it contrasting 

 with the rest of the thorax is characteristic of this species, but 

 only well preserved specimens show it. There are only two to 

 four black bristles on the margin of the scutellum. 



Erax grandis n. sp. 



Male. Total length 33 millimeters. Mystax composed of numerous 

 yellowish gray hairs and black bristles, beard pale yellowish gray, 

 palpi with black and pale hairs, thorax gray pollinose with unusual 

 markings, scutellum with black hairs on its disc and four black bristles 

 on its margin, femora, apexes of tibias and tarsi black, remainder of 

 tibiae pale yellow, wings slightly brownish, costa distinctly dilated, 

 furcation of third vein plainly beyond the base of the second posterior 

 cell, stump very short, two, three, four and five abdominal segments 

 black above, with narrow posterior margin and sides gray, segments 

 six and seven silvery. Hypopygiimi large, black with black vestiture. 



