21 



4 J 



6 



Miller. — The Diptera Fauna of New Zealand. 323 



Table of Species. 



Abdomen with yellow markings . . . • • • • • 2 



Abdomen without yellow markings . . • • • • 5 



'Abdomen distinctly clothed with golden hairs ; the yellow 

 markings indistinct ; indistinct yellow markings on posterior 

 legs . . • • • • • • • • • • ineptus. 



Abdomen not distinctly clothed with yellow hairs; the yellow 

 markings distinct ; posterior legs distinctly marked with 

 yellow . . . • • • • • • • • • ^ 



A pair of large spots on 2nd abdominal segment of ? and on 2nd 



and 3rd segments of <? (figs. 66 and 71) . . . . 4 



All the abdominal segments with dark-yellow markings and pale- 

 yellow circular spots (fig. 82) . . . . . . • . cargilli. 



/Median thoracic black stripe divided centrally by a long narrow 

 yellow stripe (fig. 70) ; apex of posterior tibiae black ; no 

 tooth at base of posterior femora . . . . • • antipodus. 



(a.) A pair of small tawny spots at anterior angles of 3rd 



abdominal segment . . . . . . • . antipodus var. vin- 



cinus, ? 



Median thoracic stripe not divided; apex of posterior tibiae 



yellow ; a distinct tooth at base of posterior femora (fig. 74) trilineatus. 



Abdomen deep blue or violet-black . . . . . . hochstetteri. 



Abdomen bronzy, bronzy -green, or cupreous . . . . 6 



■Abdomen bronzy or bluish-green, without dead-black areas ; 



scutellum golden-brown basally, yellow apically . . . . campbellicus. 



Abdomen cupreous, with indistinct dead-black areas ; scutellum 



tawny . . . . • • • • • • • • chathamensis. 



H. antipodus Schiner. (Plate L, figs. 1, 4.) 



H. antipodus Schiner, Reise der Freg. " Novara," Dipt., p. 359 (1868). 

 ((J) H. antipodus Button, Trans. N.Z. Inst., vol. 33, p. 38 (1901). 

 (?) H. trilineatus Hutton, I.e. Mallota antipoda Hutton, Cat. 

 Dipt. N.Z., p. 40 (1881). (?) H. interruptus Lamb, Subant. Islds. 

 N.Z., vol. 1, p. 133 (1909). 

 A large black fly with yellow stripes on the thorax and a pair of yellow 

 abdominal spots in the female and two in the male. 



$. Eyes bare; vertex and upper part of front velvet-black (the anterior 

 margin of this colour being sinuated) and densely clothed with erect black 

 hairs ; lower part of front yellowish-brown but with a darker reflection 

 owing to vestiture of black hairs ; a black or brownish-black transverse 

 band from eye to eye, across antennae and extending very slightly on to 

 front just behind the shiny dark-brown lunular area. Antennae velvet- 

 black with a greyish reflection on the circular 3rd joint ; arista black, 

 though somewhat reddish apically ; minutely pubescent basally. Face pale 

 yellow, with a dense greyish-yellow tomentum and scattered yellow hairs 

 except on a broad triangular median area over prominence ; face moderately 



Fig. 58. — Platycheirus atkinsoni n. sp. : diagram of abdomen of male. 



Fig. 59. — Tropidia bilineata : posterior coxa, femur, and tibia. 



Fig. 60. — Mallota cingulata : outline of head in profile. 



Fig. 61. — Tropidia bilineata : genitalia of male. 



Fig. 62. — Mallota cingulata : genitalia of male. 



Fig. 63. — Helophilus antipodus : outline of head in profile. 



Fig. 64. — Mallota cingulata : posterior femur. 



Fig. 65. — M. cingulata : diagram of abdomen of female. 



Fig. 66. — Helophilus antipodus : diagram of abdomen of female. 



Fig. 67. — Tropidia bilineata : diagram of abdomen of female. 



Fig. 68. — Helophilus campbellicus : dorsal view of head of male. 

 Fig. 69. — H. campbellicus : outline of head in profile. 

 |1* 



