70 rLEUEALCH^TOTAXY. SYNOPSIS OF SPECIES. 



row formed by the first and inner dorso-centrals, and the marginal 

 and apical scutellar bristles. 



Pleural aspect (Fig. 1 1). — Prothoracic, 1. Stigmatic (cf. Becker, 

 Berl. Ent. Z. xxxix (1894), p. 83), 1. Mesopleural, a vertical row of 

 about 6 along the posterior edge, with smaller bristles in between. 

 Pteropleural* a vertical row of usually 3 (stout and conspicuous 

 only in Gl. longipennis, Corti, and Gl. fusca, Walk., more 

 numerous in the latter than in the former), with smaller bristles 

 on either side. Siernopleural, 3, — 1 anterior, and 2 posterior : 

 below, a conspicuous row of bristles in front of the middle coxse. 

 Hypopleural, none. 



SYNOPSIS OF SPECIES. 



1. Hmd tarsi entirely dark -. 2 



Hind tarsi not entirely dark : last two joints 



alone dark, remainder pale 3 



2. Third joint of antennae dusky-brown to 



cinereous-black palpalis, Rob.-Desv. 



Third joint of antennae pale (orange-bufi) ... pallicera, Bigot. 



3. Large species : length at least 10^ millim. 



(5 lin.), wing-expanse (measured from tip 

 to tip, when wings are set at right angles 



to body) at least 25 millim. (11| lin.) 6 



Smaller species : length not exceeding 10^ 

 millim. (5 lin.), often considerably less ; 

 wing-expanse not exceeding 22J millim.) 

 (10^ lin.) 4 



4. Last two joints of front and middle tarsi with 



bharply defined dark brown or black tips. . . 5 



Last two joints of front and middle tarsi with- 

 out sharply defined dark brown or black 

 tips — front and middle tarsi entirely yellow, 

 or last two joints of former faintly tipped 

 with pale brown pallidipes, sp. nov. 



5. Generally distinctly larger; head wider; front 



darker and narrower in both sexes, sides 

 parallel in S \ abdominal bands deeper, 

 leaving hind margins of segments only 

 narrowly pale ; hypopygium in i smaller, 

 darker, and more hairy ; tip of i abdomen 

 more thickly clothed laterally with short 

 black hair, bristles on 6th segment finer 

 and less prominent longipalpis, Wied. 



* Pteropleural bristles seem to be entirely wanting in Stomoxys, 

 ' Bscniatobia , and other genera of Muscinse. 



