BY FREDERICK A. A. SKUSE. 113 



•^^J.—Wentworth Falls, Blue Mountains (Skuse). In damp 

 caves in January. A single specimen. 



Ohs. — Differs from A. Sydneyensis chiefly in the structure of 

 antennae (having five terminal linear joints in ^), the less distinct 

 stripe on the pleurae, and arcuated anterior boixler of discal cell. 



416. ACRACANTHA INORNATA, Sp.n. 



^. — Length of antennae O'lOO inch ... 2-54 millimetres. 



Expanse of wings 0-720xO-180 ... 18-28 x 4-56 



Size of body 0-850 X 0090 ... 21-58x2-27 



Brownish-fulvous or brownish-ochreous. Front with a small 

 deep brown spot on each side next the eyes, also a small one at base 

 of rostrum ; palpi and flagellar joints black ; fiz'st joint of scapus 

 short, twice the length of the second ; first flagellar joint almost 

 obconical, the next three more elliptical, progressively diminishing 

 in thickness, fifth cylindrical, slender, the following seven linear, 

 beset with long stiff hairs. Thorax somewhat shining, with faint 

 indications of three brownish lines ; suture brownish ; scutellum 

 and metanotum paler than the mesothorax. Halteres ochreous, 

 the club slightly infuscated. Abdomen somewhat shining, slightly 

 infuscated with brownish from second segment ; ovipositor almost 

 fulvous, the valves straight and slender, longer than in A. Sydney- 

 ensis. CoxsB and femora ochreous or fulvous, the tip of the latter 

 brown. Genua pale. Tibise and tarsi deep brown or black. Tarsi 

 twice the length of the tibise (the hind legs wanting in the speci- 

 men before me). Wings with a pale brownish tint, the costal cell 

 and stigma more ochreous ; veins brown. Anterior branch of the 

 second longitudinal vein equal in length to petiole of first sub- 

 marginal cell ; second posterior cell sessile, in punctiform contact 

 with the discal ; the latter rather elongate, pentangular ; fifth pos- 

 terior cell in punctiform contact with the discal. 



Hah. — King George's Sound, "Western Australia (Masters). A 

 single specimen in Coll. Australian Museum. 

 8 



