366 SUPPLEMENT. 



white dust, still in a certain light almost silvery ; cilia of the tegulse pale ; halteres yellow. Abdomen 

 green, with three pairs of lateral yellow triangles and some indistinct yellow markings on the dorsum of 

 the first two segments ; hypopygium small, greenish, rather embedded, with two minute yellow filaments 

 protruding. Legs, including the coxae, yellow, without bristles or special structures ; the tarsi but little 

 infuscated, except the hind ones, which are blackened from the beginning of the second joint. Wings 

 hyaline, the costa not ciliated, the third vein bicurvate, the hind cross-vein with a slight double curvature. 

 Length 4-4 millim. 



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

 Two males. 



4. Gnamptopsilopus ciliipennis, sp. n. (Tab. VI. fig. 24, wing of s .) 



(5 . Face blue, rapidly widening above, with sparse white pollen. Antennae black, without any bristles of 

 noticeable size. Front broad, blue or purple, destitute of pale hairs. Thorax bright bluish-green, the 

 sides with sparse white pollen ; cilia of tegulae blackish ; halteres yellow, the basal part of the stem 

 infuscated ; scutellum with a large inner and a very small outer pair of bristles. Abdomen somewhat 

 elongate, with rather long bristles before the incisures ; hypopygium small, almost globular, blackish, the 

 basal part metallic green below, the appendages minute, hairy, and blackish. All the coxae, trochanters, 

 and femora black ; the femora have very few and small pale hairs below ; tibiae destitute of bristles, 

 yellow, the bind ones moderately infuscated for the greater part of their length, especially on the outer 

 side ; tarsi elongate, moderately infuscated from near the base, the hind ones more distinctly so. Wings 

 subhyaline, with a brownish tinge along the costal half; costa ciliated with fine, somewhat erect, hairs to 

 the end of the second vein or beyond it ; first vein ending before the middle of the wing ; third vein 

 very distinctly bicurvate near the tip ; first posterior cell very wide ; hind cross-vein long and curved, 

 with the convexity towards the margin. 



Length 4*1 millim. 



Hab. Mexico, Omilteme in Guerrero (//. H. Smith). 



One male. The females, from the same locality, and taken on the same date, differ 

 from the description in having the fore coxa? and all the trochanters and femora 

 yellow ; the fore coxa? with pale hairs only at the tip ; the wings with a row of minute 

 slanting hairs only, from the tip of the first vein to that of the second. 



EMPIRE*. 



Subfam. EMPINJE. 



EMPIS(p. 214). 



Synopsis of the Central- American forms. 



[The species described by Osten Sacken {anted, pp. 215, 216), as well as some of those of Loew, Wiedemann, 

 and Beliardi, are unknown to us, and the characters are therefore taken from the descriptions.] 



1. Metallic green-blue or black species ; sixth vein evanescent ; legs pecu- 



liarly ornamented. (Lamprempis, subgen. nov.) 2. 



Not such species 6. 



2. Legs yellow; no pollinose stripes on the mesonotum 3. 



Legs black or dark brown 4. 



* By Prof. W. M. Wheeler and A. L. Melander, of the University of Texas. 



