Miller. — The Dipt era Fauna of New Zealand. 301 



Genus Syrrhus Fabr. (1775). 



In this genus the face, which is vertical, though slightly concave, and 

 gently produced to the knob, is yellow, with or without a darker median 

 stripe, or altogether rnelanoid ; the antennae are short, the 3rd joint being 

 circular or somewhat oval ; the dorsum of the thorax may be immaculate 

 or margined with yellow ; the scutellum is completely or partially yellow, 

 altogether blackish or at times diaphanous ; the pleurae may have yellow 

 markings ; the legs are rather slender, the femora not being thickened ; 

 in the wings the r-m cross-vein is considerably before the middle of cell 

 1st M 2 , and the vein R 4 + 5 is straight, or practically so, above cell E 5 ; 

 the abdomen is elongate, somewhat ovate, narrow with parallel sides or 

 restricted along the middle segments ; it is usually spotted or banded with 

 yellow or, as in two of the new species, immaculate. 



Of the seven species recorded below, three are new. The resemblance 

 of S. ropalus Walk, to Paragus pseudo-ropalus n. sp. has already been noted, 

 while in a former work* the writer has pointed out that S. obesus Hutton 

 = *S. viridiceps Wied., an Australian species. 



Table of Species. 



, J Abdomen immaculate, either blue-black or orange-brown . . 2 



( Abdomen spotted or banded with yellow . . . . . . 3 



Face blue - black, golden -pruinose ; abdomen orange - brown ; 



length of ? , 11 mm. . . . . . . . . . . harrisi n. sp. 



2 J Face tawny, with a median blue-black stripe extending broadly 



along oral margin (fig. 24) ; abdomen deep shiny blue ; 



length of ? , 6 mm. . . . . . . . . . . flavofaciens n. sp. 



(Abdomen spotted and with 2 transverse bands, one on the 3rd 



3 ■! and the other on the 4th segment . . . . . . 4 



(Abdomen not banded but with pairs of spots on segments . . • 5 



/Robust species ; abdomen broad, bands occupying most of 3rd 



and 4th segments ; antennae ochreous ; pleurae with a 

 . J tawny transverse band . . . . . . . . viridiceps, s ■ 



I Slender species ; abdomen narrow, bands confined to anterior 

 half of 3rd and 4th segments ; antennae brownish-black ; 

 \ no band on pleurae . . . . . . . . . . ropalus. 



f. i Front without yellow markings . . . . . . . . novae-zealandiae. 



J Anterior half of front partly or completely ochreous .. .. 6 



/Robust species; abdominal spots large, occupying greater part 



of segments ; pleurae with a tawny band . . . . viridiceps, ? . 



6 J Slender species, particularly the males; abdominal spots not 

 large ; no band on pleurae, at most mesopleurae partially 

 yellow . . . . . . . . . . . . 7 



Face with a blackish central stripe ; abdomen of <? with 4 pairs 

 of oblique spots but not especially narrowed along middle ; 

 length, 6-9 mm. . . . . . . . . . . ortas. 



7 J Face without a blackish central stripe ; at most with a darker 

 yellow marking ; abdomen of <f very narrow, with 3 pairs 

 j of oblique spots, and restricted along the middle; length, 



\ 10-10'5 mm. . . . . . . . . . . hudsoni n. sp. 



S. harrisi n. sp.f (Plate LII, fig. 2.) 



$. A rather large fly, with a brilliant cupreous thorax, orange-brown 

 abdomen, and wings tinged with tawny. 



Eyes bare ; ocelli pale yellow ; front blue-black, clothed with scattered 

 yellow hairs which are confined more toward the upper orbits ; lower frontal 



* Diptera of the Kermadec Islands, Trans. N.Z. Inst., vol. 46, p. 126 (1914). 

 | Named after Mr. J. R. Harris, of Ohakune. 



