426 R. OSTEN SACKEN 



Section Xjeptog-astiriua.. 



Although there are seventeen species of Leptogaster from the 

 Malay Archipelago , described by MM. Doleschall , Walker and 

 van der Wulp, the two species which I describe below, do not 

 seem to be among them. 



Leptogaster angelus n. sp. c/". Black, thorax shining, pleurae 

 hoary ; wings crystalline, fork of the third vein not longer than 

 its petiole. Length: 11-12 mm. 



Face whitish, occiput grayish ; scapus of the antennae black, 

 (the rest broken). Thorax black, very bright and shining, with 

 a slight greenish-metallic lustre ; pleurae, pectus , and coxae 

 silvery-sericeous ; posterior portion of the thoracic dorsum gra- 

 yish pollinose, as well as the scutellum. Abdomen black, with a 

 slight bluish lustre, especially visible on the proximal half. Hal- 

 teres with a brown knob. Legs reddish ; front pair with the tip 

 of the femora brown and the base of the tarsi pale yellow ; 

 (middle pair wanting); last pair with the base of the femora 

 pale yellow, a brown ring before their tip, and the extreme 

 tip, brown ; the hind tarsi have the tips of all the joints brown. 

 Wings very transparent and colorless (crystalline), veins black; 

 fork of the third vein unusually short, not much longer than 

 its petiole ; the cell enclosed in it (second submarginai), is very 

 much coarctate at the tip ; the fourth posterior cell is unusually 

 short, as the intercalary vein issues from the discal cell far 

 beyond the posterior crossvein (the distance being about equal 

 to the length of the intercalary vein). 



Hah. Kandari, Celebes, April 1874 (Beccavi). A single male. 



Leptogaster inflatus n. sp. 9 . Brown , wings brownish , the 

 apex subyaline. Length : 13-14 mm. 



Antennae black, third joint nearly three times the length of 

 the scapus, narrow-lanceolate; arista rather stout, not much 

 longer than the first joint. Face with a brownish-golden pube- 



