100 0. R. Osten Sachen: Diptera 



Ptecticus sp. A Single specimen, which Mr. Walker had iden- 

 tified with his Sargus rogans from the Aru Islands. 



Ptilocera amethystina Sn. v. Voll. — Three $, 6 $. The 

 females have the anal and axillary cells and the proximal end of the 

 fourth post. c. hyaline, while in the males these parts are brownish. 

 In the specimens wliich I have seen from Celebes and New Guinea 

 this character was not sexual; at least most of the females had no 

 hyaline space in the anal portion of the wing. I am not satisfied yet 

 about the specific distinctness of this species from P. smaragdina 

 V. Voll. (Compare Enumeration etc. p. 24). 



Musama pauper Walk. J. Pr. Linn. Soc VII, 205 (Mysol). — 

 A Single specimen thus determined by Mr. Walker; but the description 

 disagrees from it in many points, 



Leptidae. 



AtherioG limhata n sp. Wings subhyaline as far as the 

 proximal end of the discal cell; tinged with pale brownish on 

 the distal half. — Length about 9 mm. 



Front and vertex black, the former slightly whitish above the an- 

 tennae; face black, with a whitish reflexion; antennae brownish-yellow. 

 Thorax blackish-gray , whitish - hoary on the pleurae and with whitish 

 reflexions on the mesonotum; humeri, the posterior part of the meso- 

 notum and the scutellum brownish-yellow. Halteres yellow with a 

 brown knob. Abdomen brownish-yellow; the base, a dorsal stripe on 

 Segments 2 and 3, and the greater part of segments 4, 5, 6, are dark 

 brown (this is the case in one of the specimens; in the other the ab- 

 domen is möre uniformly brownish-yellow). Front coxae blackish, 

 whitish-hoary ; the other coxae brown; femora brownish-yellow, the 

 hind ones with a broad brown ring before the tip; tibiae and tarsi 

 dark-brown; intermediate tibiae yellowish-brown. Proximal half of the 

 wings, as far as the proximal end of the discal cell, subhyaline; distal 

 half pale brownish, gradually turning into grayish towards the tip; 

 costal cell and surroundings of the stigma, yellowish. — Two females, 



NB. I. Atherix nigritarsis Dol. 3 Bijdr. 20 (Amboina) is closely 

 related to this species, as I can ascertain, not only from the des- 

 cription, but from an unpublished colored drawing in my possession. 

 The principal dififerences appear to be: the hind femora of A. nigri- 

 tarsis have no broad brown i'ing before the tip; the scutellum is of 

 the same color as the mesonotum; the abdomen has brown crossbands, 

 and not a longitudinal brown stripe. 



