DIPTEEA. 2 / i 



Thorax with yellowish hair along the sides and in front. Abdomen with black hair along the sides. 

 intermixed with white, especially in front ; last two segments clothed with silvery hair. Front tibiae 

 smooth ; pulvilli wanting. Wings brown and hyaline : the brown coloration fills out the basal two-thirds 

 or thereabouts of the anal cell, the base of the third and fourth posterior cells, the base of the discal, first 

 posterior, and first submarginal cells, and the marginal cell as far as the tip of the first vein ; in addition, 

 there is a spot on the outer cross-vein and on the veins at the base of the other submarginal cells. Length 

 9 millim. 



Hab. Mexico, Amula in Guerrero (H. H. Smith). 



One specimen. This species differs materially from A. blanchardiana in having a 

 conical, not receding face ; the style of the antennae is thicker (instead of hair-like), 

 and the smooth tibiae are also otherwise formed. These differences again indicate that 

 Isopenthes is not a valid genus. Possibly the present species has normally but two 

 submarginal cells and has been described under Anthrax ; if so, I fail to find it. 



Anthrax lucifer (p. 116). 



Anthrax lucifer (Fabr.), Coquillett, Trans. Am. Ent. Soc. xiv. p. 180 l . 



To the localities given, add : — United States, California \ Louisiana 1 . — Mexico, 

 Atoyac in Vera Cruz (H. H. Smith). 



Three specimens. 



Anthrax arethusa (p. 116). 



To the localities given, add : — United States, Colorado. New Mexico (Mus. Univ. of 

 Kans.). — Mexico, Acaguizotla, Rincon, and Venta de Zopilote in Guerrero (H. H. Smith). 



Six specimens from Guerrero. In one of these the fourth posterior cell has a stump 

 of a vein and is not bisected, though otherwise agreeing with the rest ; another has 

 five posterior cells. 



3 (a). Anthrax pluricella, sp. n. (Tab. V. fig. 3, s .) 



rf . Wings with five posterior cells, all open, the first a little coarctate in the margin, the fourth about one-half 

 the width at the margin of the third ; second vein strongly curved forward at the tip ; anterior branch of 

 the third vein sinuous, and with a stump of a vein at the angle ; contact of the discal cell with the tilth 

 posterior cell a little greater than the length of the anterior cross-vein. The brown coloration fills out 

 the marginal cell, except a hyaline spot beyond the middle, and reaches across the first submarginal cell ; 

 its margin extends from the second vein nearly opposite the furcation, and covering the furcation, to the 

 posterior angle of the second posterior cell, thence along the vein separating the third from the fourth 

 cell and the outer end of the discal cell to the third vein, running backward a little beyond the anterior 

 cross-vein, through the extreme base of the fourth posterior cell and the base of the fifth to the tip of the 

 anal cell ; there is a small hyaline spot opposite the sixth vein at the outer part, and a brown cloud 

 covering the vein between the fourth and fifth posterior cells, nearly confluent with the brown of the 

 second cell. Legs yellow, with light yellow tomentum ; the distal portion of the femora, the tip of 

 the tibiae, and all the tarsi, brown ; front tibiae with spinules ; front tarsal joints clearly differentiated 

 and not hairy ; all the claws small ; pulvilli present, though small. Abdomen dark brown, opaque, with 

 black and fulvous tomentum : sides of the fourth segment with silvery pile ; the hair on either side of 

 the base of the abdomen longer and yellowish. Scutcllum subtri angular in shape, black, not shining, with 



