102 C. R. Osten Sacken: Diptera 



CTirysopila ferruginosa Wied. Auss. Zw. I, 224. Seven 

 specimens of this speeies which is common in the whole Austro-Malayan 

 Archipelago. These specimens have no dark incisures on the abdominal 

 Segments. (Compare my Enumeration etc. p. 31.) 



Chrysopila. Three other speeies of this genus are represented 

 by Single specimens in very bad condition. These speeies are small, 

 have a blackish-gray body, clothed with metallic scales and subhyaline 

 wings. 



Asilidae. 



Leptogaster princeps Q. Black, shining, with metallic 

 hluish or purplish reßexions, especially on the ahdomen; legs 

 more or less reddish; wings hrown with violet reflexions. — 

 Length: 24—30 mm. 



Face silvery, except immediately above the mouth, where it is 

 shining black; front and vertex black, shining; occiput grayish-silvery ; 

 antennae reddish -brown, second Joint yellowish. Mesonotum black, 

 shining, with a very slight bluish opalescence; a border of a light 

 grayish, not very dense pollen runs above the dorso-pleural suture and 

 also Covers the scutellum and metanotum; pleurae subopaque, brownish- 

 pollinose. Abdomen black, shining, with distinct bluish or purplish 

 reflexions, some reddish shades on the ventral side vary in extent in 

 diflFerent specimens. Kälteres either altogether dark brown, or knob 

 reddish. Legs more or less dark brown, with a very slight metallic 

 purplish reflexion; bind tibiae more or less reddish, as also the end 

 of the bind femora, where the reddish sometimes reaches beyond the 

 middle. Wings brown , with purplish reflexions ; proximal end of the 

 second posterior cell but very little nearer the root of the wing than 

 the proximal ends of the second submarginal and third posterior cells; 

 contact of the fifth post. c. with the discal very short; anal cell closed, 

 petiolate at the tip. — Three females. 



NB. This fine speeies differs in several respects from the european 

 speeies of the genus; the third antennal Joint is more than three times 

 as long as the scapus, narrow, almost linear, a little attenuated towards 

 the tip; the two-jointed style is about one fourth the length of the 

 third Joint; the mystax is composed of a few weak, inconspicuous hairs; 

 the anal cell is closed. The characteristic thoracic bristles of this 

 genus are also quite conspicuous in the present speeies: I mean the 

 praesutural bristle and the intra-alar, one on each side. 



Leptogaster sp. — A single male. An inconspicuous speeies; 

 mystax weak, as in the preceding speeies; anal cell closed. The an- 

 tennae are broken. 



