SAUCROPUS. 225 



The characters by which the genus Saucropus is distinguished 

 from the related genera, need not be repeated here, as they have 

 already been sufficiently explained among the characters of those 

 genera. 



The name- of JSaucropus (from aavxp6$, delicate, and rtov;, foot) 

 has reference to the great sleuderness of the feet, which distin- 

 guishes all the species of this genus. 



The known species are distributed over Europe, America, and 

 South Africa. The American species resemble more those of 

 Europe than those of South Africa ; in the latter the third and 

 fourth longitudinal veins are parallel, while in the European 

 species the last segment of the fourth longitudinal vein approaches 

 the third longitudinal vein, although very gradually, still, in gene- 

 ral, very strongly. 



li S. dimidiatus LOEW. . Pallide flavus, thoracis linea media et 

 macula postica nigris, abdomine nigrofasciato, setis -coxarum anteriorum 

 albidis. 



Pale-yellow, thorax with a black middle line and with a black spot upon 

 the posterior end, abdomen with black bands ; the anterior coxae with 

 whitish bristles. Long. corp. 0.18. Long. al. 0.17. 



SYN. Saucropus dimicliatus LOEW, Neue Beitr. VIII, 75, 1. 



Pale-yellowish. Face very narrow, white. Antenna? bright- 

 yellow. Front black with white dust ; frontal bristles black. 

 Cilia on the posterior orbit as well as the two stronger bristles 

 behind the upper corners of the eyes, yellow-whitish. Upper side 

 of the thorax reddish-yellow ; the middle line and the sloping sur- 

 face on its posterior margin are black. Scutellum whitish-yellow 

 with two strong black bristles ; on the outside of each of these 

 bristles there is a very small delicate hair, easily overlooked, which 

 in all our European species is much stronger. Metathorax black ; 

 the pleura? have a small black dot above the middle coxa?. Abdo- 

 men with three black transverse bands, the first in the vicinity of 

 the basis of the second segment, the two following near the basis 

 of the third and fourth segments ; the two last are somewhat 

 emarginated on the middle of their posterior margin. Hypopy- 

 gium short and clumsy, shining black ; its small exterior appen- 

 dages are white. Coxa? and feet pale-yellowish ; on the fore and 

 middle coxa? there are altogether no black, but only whitish bris- 

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