292 Transactions. 



The abdomen is ovate (particularly in some females), elongate and 

 narrow with parallel sides, or sides converging basally or along the middle, 

 or rectangular ; bare, or sparsely or densely clothed with hair, or some- 

 times with bristles to a certain extent. In the New Zealand species there 

 are 4 visible segments in the male and 5 in the female ; in the male 

 segments 5-9 are curved to one side beneath the apex of the abdomen ; in 

 the female the apical segments are usually retracted within the 5th, but 

 may be extruded to some considerable length. 



The colours of the Syrphidae are frequently more intense in warmer 

 parts of the Dominion and are usually conspicuous. Although a few are 

 melanoid, many are brilliantly metallic, or black with yellow or white spots 

 and stripes ; there are also reflections of various hues caused by tomentum 

 or the arrangement of the vestiture. On account of the structure, the 

 flower-frequenting habit, and the mode of flight, many syrphids closely 

 resemble certain Hymenoptera : the European narcissus-fly (Merodon 

 equestris Fabr.), sometimes found in New Zealand, bears a strong 

 resemblance to a bumble-bee, while the European drone-fly {Eristalis 

 tenax Linn.), now well established in this country, is frequently mistaken 

 for the honey-bee. The absence of indigenous Apidae may account for 

 the absence among New Zealand syrphids of those densely-haired, and 

 bee-like species. It is also noteworthy that the native bees are all of the 

 short-tongued group, and that there is an amount of resemblance between 

 these insects and certain native syrphids : for example, Lepidomyia deces- 

 sum Hutton is superficially similar to the native Halictus huttoni Cam.* 



In the following pages some thirty-three species are recorded, three of 

 which are of European origin, one is found also in Australia, and the 

 remainder are indigenous ; of these, fourteen are new species. As in Part I, 

 the terms pro-, epi-, meso-, meta-. and onycho-tarsus are used for the 1st to 

 5th tarsal joints respectively, as suggested by Williston. Unless otherwise 

 stated, the term " front ' : refers to the front and vertex. 



Table of Genera.+ 

 , f Cross-vein r-m before middle of cell 1st M 2 . . . . . . 2 



(Cross-vein r-m at or beyond middle of cell 1st M 2 . . . . 9 



Subfam. Syrphinae. 



[Species with yellow markings on face or abdomen, or both . . 3 

 2 -j Species without yellow markings, but with greyish tomentose 



( areas or white spots on abdomen . . . . . . 6 



„ J Face distinctly convex and produced at knob and mouth (fig. 5) Paragus. 



\ Face not produced, but vertical or slightly concave . . . . 4 



* An account of the economic aspect of tins family, " Economic Bearing of Hover- 

 flies," is given by the author in N.Z. Jour. Agric, vol. 17, No. 3, pp. 129-35 (1918). 



t Species likely to be confused. 



I Paragus pseudo-ropalus n. sp. (Plate LII, fig. 1 ; and text-figs. 5, 12.) 



I SyrpMis ropalus Walk. (Text-fig. 37.) 



I Myiatropa campbelli n. sp. (Plate LI, fig. 1 ; and text-figs. 80, 84, 86.) 



{Helophilus cargilli Miller. (Text-figs. 75, 82.) 



j Heliophilus antipodus Schiner. (Plate L, figs. 1, 4 ; and text-figs. 63, 66, 70-73.) 



[Helophilus trilineatus Fabr. (Text-figs. 74, 76, 77, 79.) 



(Helophilus campbellicus Hutton. 



| Helophilus chathamensis Hutton. 



iCheilosia cunninghami n. sp. 



■j Xylota montana n. sp. 



[Lepidomyia decessum Hutton. 



