BY FREDERICK A. A. SKUSE. 99 



black hairs ; flagellar joints of antennae bi'own. Thorax slaty- 

 grey, opaque, clothed with short pale hairs, with four brown 

 stripes, the intermediate two cuneiformly narrowed posteriorly, 

 extending from anterior margin almost to the suture, the lateral 

 ones short, reaching suture ; a pair of brown spots on each side 

 behind the suture, the anterior spot small, roundish, the hinder 

 one large, of indefinite shape ; pleurae and metathorax greyish- 

 ochreous. Halteres brown, fulvous at extreme base of stem. 

 Abdomen black, levigate, clothed with short pale hairs ; the first 

 segment dull greyish-brown or greyish-ochreous ; and the anterior 

 half of the second segment nitidous, transparent, fulvous-brown 

 (with a dark brown median dorsal stripe in one specimen) ; 

 holding-forceps brown. Legs very long, black ; the coxae and 

 basal portion of femora ochreous or fulvous. Wings semi- 

 transparent, with a greyish tint, brownish in the costal cell ; 

 stigma ochreous-yellow. The venation as described in the 

 generic diagnosis. 



Ilah. — Sydney (Masters and Skuse). Two specimens. April. 



II. Distinct nasus to rostrum ; ^ forceps usually of com- 

 plicated STRUCTURE. 



B. Antennae simple, sometimes serrate. 



1. Antenwn short in both sexes, loith a variable number of 

 joints ; and a certain number of linear terminal joints. 

 Rostrum stout and short, 



a. Genitalia not pi-otruding in either sex. 



Genus 10. Semnotes, Westw. 



Semnotes, Westw., Trans. Ent. Soc. Lond. 1876, p, 501 ; 0.- 

 Sacken, Studies, I., p. 181, 1886. 



First longitudinal vein joining the anterior branch of the second 

 longitudinal in such a manner that the ultimate section of the 

 branch appears as a straight continuation of the first vein ; prse- 

 furca as long as or a little longer than great cross-vein ; second 



