70 DIPTEEA. 



and do not reach beyond the suture posteriorly, the lateral ones run from the humerus 

 to the scutellum ; humeri yellow ; pleurae rufous, mixed with yellow and brown ; sternum 

 brownish ; metanotum reddish-yellow, darker under the scutellum. Halteres pale 

 rufous. Legs pale rufous ; proximal half of the femora and tibiae still paler, almost 

 whitish-yellow on the hind pair ; hind femora with a few short bristles on the under- 

 side of the incrassation towards the end; hind tibiae distinctly curved, beset with 

 scattered weak bristles ; hind tarsi comparatively short. Abdomen rufous ; hind 

 margins of segments 3-7 ill-defined yellowish ; the lateral margins of segments 2-7 

 have a black stripe, interrupted by the yellow on the sutures ; on the hind margin of 

 segment 2 there is a pair of deep-black oblong spots (corresponding to similar spots in 

 L. sponsor and L. p anther inus). The coronet of spines at the end of the abdomen (?) 

 is black. Wings with a pale brownish tinge; veins clouded with a darker brown; 

 costal vein yellowish. A single female. 



N.B. — This is undoubtedly a Leptomidas, its short proboscis notwithstanding. The 

 vein following the forked vein ends at the very tip of the first vein, on one of the 

 wings almost in the alar margin. It is very probable that in this species, like in some 

 other Midaidae of the same colour, the distribution of the rufous and darker tints is not 

 altogether constant, and this circumstance must be taken into account in identifying 

 such species. 



MIDAS. 



Mydas, Fabricius, Ent. Syst. iv. p. 252 (1794). 



Midas, Wiedemann, Aussereur. zweifl. Ins. i. p. 239 (1828). 



1. Midas rubidapex. 



Midas rubidapex, Wiedem. Mon. Midar. p. 40, t. 52. f. 2; Bellardi, Saggio &c. ii. p. 5 1 . 

 Hab. Mexico {Salle 1 ); Guatemala, San Geronimo (Champion). 



I have three male specimens from San Geronimo, agreeing with the descriptions, 

 except that the ungues are not " flavescentes, ad apicem nigri," as Bellardi describes 

 them, but altogether black, slightly chestnut-brown about the middle. The antennal 

 scapus alone is black, the rest of the antennae yellowish-orange ; according to Wiede- 

 mann the colour varies, the club alone being sometimes yellow. All our specimens 

 have a tuft of white hairs above the hind coxae. 



2. Midas dives. 



Midas dives, Westw. Arcana Ent. i. p. 50, t. 13. f. 1. 



Hab. Panama, Bugaba (Champion), near the city (J. J. Walker).-— Brazil (Bert Mus.). 



This species is exceedingly like Midas rubidapex; the differences are: — (1) the two 

 basal segments of the abdomen are clothed on the dorsal side with golden down, which 



