326 SUPPLEMENT. 



16. Erax disjunctus, sp. n. 



6 . Front and face thickly covered with yellow pollen. Face moderately protuberant below, clothed with 

 black and light yellow bristles. Beard white ; bristles of the upper part of the occiput black. Palpi 

 with black bristles. Thorax covered with brownish -yellow pollen; mesonotum with two broad, 

 indistinctly separated, opaque black stripes. Scutellum with black bristles on its margin ; the black 

 hairs on its upper surface short and sparse. Abdomen opaque black ; first, second, and third segments 

 each with two silvery-white spots on the posterior margin ; lateral margins of the second, third, fourth, 

 and fifth brownish-yellow ; sixth and seventh segments silvery-white, the former with a black spot in the 

 middle ; hypopygium short and stout, dark red, without black hair above. Legs black ; hair very short, 

 black on the femora, reddish on the front and hind tibiae. Wings yellowish, brownish at the immediate 

 tip ; furcation of the third vein opposite the base of the second posterior cell, without stump ; costa not 

 dilated. Length (without the forceps) 13 millim. 



Hab. Mexico, Atoyac in Vera Cruz (H. H. Smith). 

 One specimen. 



17. Erax pavidus, sp. n. 



3 . Front and face covered with brownish-yellow pollen, which is not very dense. Face strongly protuberant 

 below, covered, for the most part, with black hair, which is abundant, and only slightly intermixed with 

 light yellow on the lower part. Front with long black hair. Beard light yellow ; hair and bristles of 

 the upper part of the occiput black. Palpi with black hair and bristles. Mesonotum covered with 

 brownish-yellow pollen, leaving two, feebly separated, black stripes in the middle and two partially 

 confluent spots of the same colour on each side. The long black hair is sparse, except in the middle and 

 behind. Scutellum with black hair and bristles. Abdomen deep opaque black, with long, not abundant 

 hair, which is black on the first segment, both above and below, white on the sides of the second and 

 third segments, and on the undersides of all the segments, except the first ; second and third segments 

 on each side with a narrow silvery-white spot posteriorly ; sixth and seventh segments silvery-white, the 

 sixth with a narrow black stripe in the middle ; hypopygium large, black, with long black hair on' the 

 underside. Legs : femora greenish-black, with long and abundant hair, especially on the front part, 

 for the most part black in colour ; tibiae reddish-yellow, their tip, and also the tarsi, deep black ; hair of 

 the tibiae long, black and yellow. Wings light brownish, at the base more nearly hyaline ; costa 

 expanded distally ; furcation of the third vein beyond the proximal end of the second posterior cell, with 

 a short stump. Length (without the hypopygium) 19 millim. 



Hab. Mexico, Xucumanatlan in Guerrero 7000 feet (H. H. Smith). 

 One specimen. 



18. Erax dolichogaster, sp. n. (Tab. VI. fig. 6, <? .) 



6 . Front and face covered with brownish-grey pollen. Face strongly protuberant below, covered with black 

 bristles, somewhat intermixed with yellow hairs. Palpi with black bristles. Beard nearly white. 

 Mesonotum yellowish-grey, with a median, geminate black stripe and two oval, subconfluent, black spots 

 on each side ; hair not very long, black. Scutellum with white hairs above and black bristles on its 

 margin. Abdomen black, a little shining, with white hairs on the basal segments above and below ; 

 rather slender, the fifth segment cylindrical ; lateral margins of all the segments grey-pollinose ; posterior 

 margin of the sixth segment narrowly in the middle, and the whole of the seventh, silvery-pollinose ; 

 hypopygium rather slender, with black hair. Legs black; hair on the underside of the four anterior 

 femora moderately long, white. Wings brownish distally; costa dilated; furcation of the third vein 

 beyond the proximal end of the second posterior cell, with a stump. Length (without the hypopygium) 

 17 millim. 



Hab. Mexico, Atoyac in Vera Cruz, Teapa in Tabasco (H. H. Smith). 



