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Volume 53, 1921
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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.

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reach quite to the posterior margin except where they are continued round the posterior angles and extend for a short distance as a spot on each side along the anterior margin of the 3rd segment; the tawny vestiture, also, is more distinct and forms orange-yellow hair most conspicuous along the sides of 3rd and 4th segments; in some cases the tawny areas of the 2nd segment may be confluent with those of the 3rd over the posterior margin of the former segment; there may also be a small tawny spot at anterior angles of 4th segment. All the known specimens of this variety are from the Chatham Islands. The development of the abdominal spots and the conspicuous orange-yellow vestiture tend to show that this variety is intermediate between the ♀ and ♂ antipodus.

The male of antipodus differs from the female in the following: Vestiture of face longer; posterior femora rather broader; apical markings of anterior and middle tibiae less distinct; abdomen with a more conspicuous vestiture and the 3rd segment with a distinct pair of tawny spots (fig. 71); tawny areas of 2nd segment much broader than ♀, thus resembling those of var. vincinus ♀; the indistinct greyish-black spots of 4th segment present as in ♀. Genital segments (figs. 72 and 73) blue-black, the genitalia tawny.

♂. Length, 11–12 mm. ♀. Length, 13–15 mm. ♀. Length, 14 mm. (var. vincinus).

Plesiotype: No. 977, D. M. Syntypes: Var. vincinus, Hutton's collection, Canterbury Museum.

Habitat.—Throughout New Zealand; Campbell Islands; var. vincinus, Chatham Islands.

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