PTliCTICUS APICALIS. 63 



trigonal and of a pale yellow color above the antennae. The 

 latter are reddish-yellow , the arista fuscous. Thorax brown- 

 ish , with a slight indication of three longitudinal dark bands , 

 and with a dense and short, yellowish pilosity. Abdomen 

 convex ; the two or three last segments dark purplish brown • 

 genitals fulvous , very prominent and complicated. Legs red- 

 dish-yellow; the apical half of the hind tibiae and the two 

 basal joints of the hind tarsi brownish ; the basal half 

 of the posterior femora thicker than the distal half; hind 

 tibiae slender at the base. Halteres reddish-yellow. Wings 

 with a fulvous tinge on the basal half, brownish on the distal 

 half, darker towards the anterior margin; hind margin, 

 below the anal vein , greyish. 



A few male specimens from Sumatra (van Lansberge) and 

 a single one from Borneo (Muller). 



I should be inclined to regard this species as Pt. leoni- 

 nus Rond. (Ann. Mus. Gen. VIL 454), but Rondani 

 describes the last abdominal segment with the genitals 

 as being black. 



11. Ptecticus illucens , Schin. 

 Schiner, Dipt. Novara-Reise , 65. 40. 



Both sexes from Japan (von Siebold). 



This species differs from the greater part of the other 

 species of the genus Ptecticus by its dark coloration; the 

 shape of the antennae however , — the second joint being 

 prolonged at the inner side and projects over the third , — 

 leaves no doubt, that it must be placed in that genus. 



Sargus teiuhrifer Walk. (List Dipt. Brit Mus. UI. 517) 

 from China seems to be closely related; it has however only 

 a yellow base at the front femora, while the anterior knees 

 and tarsi have not that color. As this species for the rest 

 agrees in all respects, it certainly ought to be placed in 

 the genus Ptecticus. 



12. Ptecticus brevipennis , Roud. 

 Sargus brevipennis, Rond. Ann. Mus. Gen. VII. 454. 



]N"otes from the Leyden IMusevitn, Vol. "VII. 



