the gemts Systr opus. 573 



pearance when fiilly developed ; instead of forming an 

 apparently solid, single, porrected proboscis with the end 

 divided into two recurved, slender lobes, the month pre- 

 sented four delicate, straight lancets, represented in fig. 

 10 ; one, the longest (fig. 10a), representing the labium ; 

 another, about two-thirds of the length of tlie former, 

 which I regard as the tongue (fig. lOi), two still shorter 

 pieces which seem to represent the maxillae (fig. lOcc); 

 and at the base are two short, thicker pieces which I 

 regard as the palpi (fig. lOdd)', the upper lip (labrum) 

 would thus be unrepresented. 



It is interesting to find that the species of this anoma- 

 lous genus are not confined to a narrow geographical range, 

 but are very widely distributed; being natives of Africa, 

 India, the Malayan Archipelago and South America.^ 



Two additional species of the genus have, I believe, 

 been described by Signor Costa; but I have not been able 

 to meet with the memoir in which his descriptions are 

 published. 



Division A. Species AfricanaB. 

 Sp. 1. Systropus macilentus. 



" Thorace nigro, vitrinque subcoccinelleo ; abdomine 

 fiisco, basi apiceque nigro, alis infumatis." 



"Fiihler braun, 2 imd 3 Glied schwarz: Untergesicht 

 braun, Mundspalte strohgelb, Stirne gelblich. Augen am 

 Scheitel in Beriihrung: Augenhohlenrander silberAveiss. 

 Kilckenschild mit sehr'kurzen weissUchen Harchen ; neben 

 dem Schildchen an jeder Seite ein strohgelber Punkt. 

 Hinterleibstiel ocherbraun. Schwinger braun ; Knopf 

 unten weisslich, oben schwarz. Beine reiubraun ; Spitze 

 der hintersten Schenkel schwarz; hinterste Schiene rost- 

 gelblich, mit schwarzer Spitze. Fusswurzelspitze braun- 

 lichschwarz." 



Long. Corp. lin. 7. 



Habitat apud Promont. bon® spei. 



In Mus. Berol. et Westermann. Etiam in Sierra 

 Leone (Morgan). In Mus. Britann. (teste Walker, an 



recte?) 



Systr. macilentus, Wiedemann, Nov. Dipt. gen. p. 19, 

 ficr. 7 ; Auss. zweifl. Ins. 1, p. 360, pi. 5, fig. 6 ; Macquart, 

 Hist. Dipt. 1, p. 592, pi. 9, fig. 21; Walker, Cat. Dipt. 

 Brit. Mus. p. 1154. 



