324 Transactions. 



concave beneath antennae, thence evenly convex ; anterior oral margin 

 notched and descending ; a broad shiny blue-black band along oral margin 

 extending from cheek and orbit to the anterior oral angle, where it narrows 

 and is reflected upwards to follow the contour of the mouth (fig. 63) ; 

 cheeks black, with a greyish reflection and greyish hairs; proboscis and 

 palpi brownish-black ; occiput greyish-yellow, with a slate-grey reflection 

 and clothed with greyish hairs ; the posterior orbits narrowly silvered 

 for the most part, though narrowly black above. 



Dorsum of thorax (fig. 70) clothed with a short yellowish -brown pile ; 

 4 brownish-yellow stripes and 3 blackish-brown ones, the median being 

 split anteriorly by a narrow yellow stripe ; lateral black stripes with 

 narrow projections around the posterior margin of the transverse suture ; 

 a narrow blackish -brown stripe on each side from humeri toward wings, 

 but this stripe is indistinct in some lights ; pleurae black in ground-colour, 

 with a brownish or greyish tomentum and brownish-yellow hairs ; anterior 

 and posterior stigmata tawny or orange-yellow. Wings faintly tinged 

 with brown, the veins and stigma brown ; squamae and anti-squamae 

 fringed with yellow hairs ; halteres pale yellow ; scutellum brownish-black 

 or ranging to a lighter colour and clothed with black hairs and also a 

 yellow pile basally. 



Femora clothed with pale-yellow hairs, anterior and middle pair black 

 but tawny at apex ; posterior pair thickened, altogether black, clothed 

 with short black hairs and rigid ones below ; anterior and middle tibiae 

 tawny with a fuscous band apically ; posterior tibae black on basal and 

 apical third, tawny in the middle, and with an indistinct tooth below 

 distally ; all the tarsi tawny. 



Abdomen (fig. 66) broad, ovate and pointed apically, clothed with short 

 black hairs and a short yellow pile on the lighter areas ; general colour 

 shiny black ; a pair of large more or less rectangular tawny or testaceous 

 areas on 2nd segment, extending upward on each side over the posterior 

 angles of the 1st segment ; the 3rd and 4th segments have each a pair of 

 indistinct greyish-black areas as shown in fig. 66 ; the retracted segments 

 have a pair of tawny styles at the apex. 



Variations. — The fuscous apical band of middle tibiae is sometimes 

 indistinct ; the abdominal tawny areas may be narrower or broader, and 

 in some cases are reduced to a pair of somewhat circular spots on the 2nd 

 segment. 



H. antipodus var. vincinus $ Hutton. 



Helophilus vincinus Hutton, Trans. N.Z. Inst., vol. 33, p. 38 (1901). 



This variety agrees with antipodus in all respects except that the tawny 

 abdominal areas of the 2nd segment are larger and brighter and do not 



Fig. 70. — Helophilus antipodus : diagram of thoracic dorsum, showing colour-pattern. 



Fig. 71. — H. antipodus : diagram of abdomen of male. 



Fig. 72. — H. antipodus : genitalia of male, ventral view. 



Fig. 73. — H. antipodus : genitalia of male, side view. 



Fig. 74. — H. trilineatus : posterior femur and tibia. 



Fig. 75. — H. cargilli : genitalia of male, partial side view. 



Fig. 76. — H. trilineatus : genitalia of male, ventral view. 



Fig. 77. — H. trilineatus : outline of head in profile. 



Fig. 78. — H. ineptus : diagram of abdomen. 



Fig. 79. — H. trilineatus : genitalia of male, side view. 



Fig. 80. — Myiatropa campbelli n. sp. : diagram of thoracic dorsum, showing colour-pattern. 



Fig. 81. — Helophilus campbellicus : diagram of thoracic dorsum, showing colour-pattern. 



