262 Transactions. 



(about 12-15 in each) forming a triangle with the apex anterior (figs. 88 

 and 89). 



Hypopygium : S as in fig. 93, $ as in fig. 94. 



Loc. — Otira ; Banks Peninsula, Purau. 



Type in my collection. 



Apistomyia harrisi n. sp. (Figs. 96 to 109.) 



Head (figs. 97 and 98) with large and prominent turret. Eyes bisected 

 and dichoptic in both sexes, upper eyes small, occupying about J of the 

 whole eye. Antennae 12-jointed. Labrum (figs. 99 and 101) sharply 

 pointed, distinctly hairy, and terminating in a strong short spine. Intern- 

 ally the same type of barbs turned back from the point as in C. chiltoni. 

 Hypopharynx (figs. 101 and 102) short, thick, and grooved. Maxillae 

 (fig. 96) present in S, mandibles present in $. Labium (figs. 97 ; 108, 

 and 109) long, geniculate, and divaricate, more strongly setose than in 

 the other three flies, the labella show pronounced sensory organs at the 

 tips. The labella of the $ are shorter and abruptly tapering at the tip 

 (fig. 109). 



Thorax (fig. 115) normal, finely pubescent, chaetotaxy definite. Hal- 

 teres long-stalked and pear-shaped. Legs of the characteristic type, 

 hind femora long, tibial spines large, rather longer and thinner than in 

 N. hudsoni. Legs of $ proportionately shorter than in the <?. 



Wings (figs. 45 and 46) : Wing of $ larger than that of <$ (the dotted 

 lines show the primitive position of the absent veins). Fig. 49 shows 

 the bases of the macrotrichia near the cross-piece of R4+5. No other 

 wing in these flies has been noticed with the bases of the macrotrichia in 

 this position. 



Abdomen with scattered hairs on each segment, with the groups of 

 hairs ventrally as in C. chiltoni. In the <J it is laterally compressed and 

 turned up at the end ; in $ it is cylindrical, tapering posteriorly. 

 Hypopygium in the <$ of the same type as C. chiltoni, claspers long and 

 bristly. The $ hypopygium has broad laminae, and the area surrounding 

 the ovipositor is covered with a number of large and long tubercles, from 

 the centre of which projects a stiff blunt short spine. Laterally two short 

 hairy processes project from the last segment, armed at the tips with the 

 same type of tubercle and spine. 



Colour : The general colour is grey to black. Thorax a deep black 

 dorsally. The mesothoracic suture is interrupted ; the middle third of the 

 V of the tipulids is absent. Bezzi quotes Osten Sacken (1913, p. 89), 

 " thoracic suture distinct, not interrupted in the middle," and refers to 

 the importance of this character (1914, p. 89). In C. chiltoni and A. harrisi 

 the lateral margins are yellow, and the yellow shows as a trident-shaped 

 marking in fresh specimens between the lateral prominences of the scutellum 

 of the mesothorax (fig. 115). Darker markings show round the junction of 

 the femora and trochanters. 



Loc. — Ohakune, North Island. 



Type in my collection. 



Larva of A. harrisi. — The Ohakune larvae, which I take to be those of 

 A. harrisi, have similar characters to the Otira larvae (? N. hudsoni), but 

 in all stages the latter is the larger. In colour dorsally there is little to 



