BY F. W. EDWARDS. 245 



There is a damaged female of this species in the British 

 Museum from Siam (Tahim, 18th January, 1920. H. C. 

 Kobinson and N. Annandale). 



Platyura penrissensis sp. n. (Plate 10, fig. 23.) 



O*. Head dark brown, ocelli enclosed in a black spot, the 

 middle one small. Antennae with the scape ochreous, Hagel- 

 lum black, the segments cylindrical and about twice as long as 

 broad. Palpi ochreous, the first two segments brownish. 

 Thorax brownish ochreous, without markings ; mesonotum with 

 short black bristles, very dense over the wing-roots ; pleu- 

 rotergites bare ; postnotum not prominent, but with a few 

 small bristles at its tip. Abdomen mostly ochreous, the seg- 

 ments with trident-like apical bands, due to black pigment 

 showing through the integument (the bands might not be visi- 

 ble in a dry specimen). Hypopygium as figured. Legs light 

 ochreous, tibiae and tarsi darker, the fine setae arranged in 

 very regular rows ; first segment of front tarsi quite one-third 

 longer than the tibiae. Wings with a slight yellowish tinge ; 

 a brown band just before the' tip, extending from R^ into cell 

 Mj, and a very distinct brown shade over the tip of Gu^. 

 Third costal division about two-thirds as long as the fourth ; 

 costa reaching half-way from R^ to the tip of M^, An nearly 

 if not quite reaching the margin (wing slightly damaged in this 

 position). Halteres white. 



Length of body 5.5 mm, ; wing 4 mm. 



Mt, Penrissen, 4500 feet — 1 cf . 



This is apparently nearer to P. flaviventris Brun. than to 

 any other described Oriental species, differing in the longer 

 front tarsi, etc. 



Lygistorrhina cincticornis sp. n. (Plate 9, fig. 2.) 



cf. Head black. Ocehi distinct and placed on a rather 

 prominent tubercle, middle one small. Eyes large, in contact 

 with the lateral ocelli. Front not sunken as it is in the Ameri- 

 can species. Antennae yellow, except segments 5—6 and 10— 

 15, which are blackish; flagellar segments as long as broad, 

 except the last (16th), which is nearly three times as long. 

 Proboscis ochreous. Thorax brownish ochreous, pleurae with 

 dark brown markings. Abdomen dark brown, segments 2—6 

 each with a narrow basal ring, hypopygium yellowish. Legs 

 with the coxae dark brown, the front pair ochreous at the base ; 



