184 Transactions. 



with the blackish-brown band not produced as a triangle at the sides, and 

 in the latter not extending completely across the segment ; 7th segment 

 small, the brown band occupying almost the whole surface, only a slight 

 tawny area on each side. The genital organs are tawny and withdrawn. 



In the $ the abdomen is oval, broader than the thorax, and dark tawny 

 with dark-brown bands as in the <$. The legs are also dark tawny but 

 without fuscous markings, while the thorax is not so brilliant in colour. 



o. Length, 8 mm. ; wing, 6'5 mm. 



$. Length, 8 mm. ; wing, 6-5 mm. 



Habitat. — Wellington, December (Howes), November (Hudson) ; Auck- 

 land (Bolton and Broun) ; Otago (Hutton). 



A. simmondsii n. sp.* 



$. A medium-sized fly with green thorax and dark-brown abdomen 

 with tawny markings. 



Eyes holoptic just below middle of front, distinctly pubescent ; front 

 bluish-green with silvery reflections toward the ocellar triangle, which is 

 prominent and bears long and erect stiff hairs. 



Antennae dark-brown almost black, situated a little below middle line 

 but not as long as the width of head ; 1st and 2nd joints bristly, the latter 

 about a third as long as the former, which is comparatively elongate ; 3rd 

 joint about twice the sum of the 1st and 2nd, composed of 8 segments, and 

 clavate in form ; ultimate segment almost a third as long as the whole joint. 



Face with long brownish-grey hairs, darker in certain lights, and an 

 indistinct and darker medio-longitudinal stripe. Proboscis and palpi tawny. 

 Occiput flat, black with a silvery tomentum. 



Dorsum, pleurae, and scutellum bright bluish-green, with a vestiture 

 of erect and tawny scattered hair ; the 4 scutellar spines tawny and short, 

 indistinct on account of vestiture. Halteres pale tawny. 



Legs tawny, tarsi fuscous more so apically ; the posterior pair lost on 

 my only specimen. 



Wings very faintly tinged with brown, the veins brown ; marginal cell 

 clouded with brown but lighter apically ; 1st submarginal cell proximally 

 acute ; costal cell enlarged ; 3rd vein almost straight, the anterior branch 

 about three times length of anterior cross-vein which is slightly anteriorly 

 oblique ; 3rd posterior vein reaching more than half-way to the margin ; 

 vein between the discal and 5th posterior cells longer than but not twice 

 as long as anterior cross-vein. Distance from the margin of the confluence 

 of the 5th and 6th veins about four times length of anterior cross-vein. 

 Anal angle strongly rounded. 



Abdomen brownish-black, not quite as broad as thorax, rectilinear and 

 of a uniform width throughout, in profile swollen at the apex, consisting 

 of 7 visible segments, the apical bearing an extruded and down-turned 

 tawny appendage ; 3rd to 5th segments margined anteriorly by a tawny 

 band broader at the sides, except on the 3rd, where the band is uniformly 

 thin throughout ; apical segment tawny ; ventral side dull tawny bordered 

 by brownish-black ; apical segments coloured ventrally as dorsally. The 

 whole coverd by long tawny hairs longer at the sides and shortening apically. 



c?. Length, 8 mm. ; wing, 6-5 mm. 



Habitat. — Runanga, January (Howes) ; Titahi Bay, December (Sim- 

 monds). 



*I have taken the liberty to name this species after Mr. Simmonds, of Auckland, 

 who collected the first specimens at Titahi Bay. 



