Warr.—Leaf-mining Insects of New Zealand. 465 
Авт. 34,--The Leaf-mining Insects of New Zealand : Part I11—Species 
belonging to the Genera Agromyza (Fallen) and Phytomyza (Fallen) 
(Diptera). 
By Morris №. Warr, F.E.S. 
[Read before ae Me Philosophical Society, 28th October, 1921; received by Editor, 
st December, 1921; issued separately, 12th May, 1933. ] 
Plates 38—41. 
THESE minute flies have been greatly neglected in New Zealand, only two 
species being quoted by Hutton*— 4. australensis Mik. and A. fulvifrons 
Hutton. The former I have been unable to trace, and, owing to the 
paucity of its description, have been unable to include it in the key to the 
New Zealand species. The description has been placed at the end of this 
paper. Through the courtesy of Mr. Speight, Director-of the Canterbury 
Museum, I have been able to examine the type specimen of A. — 
This was found not to belong to the genus to which it was assigned ; 
was sent to Monsieur Tonnoir at the Cawthron Institute, who places it in 
the Milichinae. T. W. Kirk has several times mentioned P. nigricornis (the 
cineraria- ©, m and P. chrysanthemani (the chrysanthemum- 
fly) in the New Zealand Journal of Agriculture. It appears very probable 
that these are "identical and that it is the same fly that attacks the thistle. 
The latter fly was sent to the British Museum, and identified there as 
have so far only succeeded in rearing parasites. In all cases P. albiceps 
was mining in thistles in close vicinity to the cineraria-plants 
Most of the species dealt with in this paper have been under «зоя ино 
for several years past; fair series of the imagines have been rear 
the mines, and from these good normal specimens have been selected li 
the types. There appears to be little variation, and in the chaetotaxy this 
tends in the direction of addition of setae ; such addition, however, is rarely 
bilateral, and the additional setae are usually under-develo Specimens 
of most of the species were sent to the Imperial Bureau of Entomology, 
ment .of Agriculture, Biological Section, Washington, for verification, and 
I have to thank Mr. Malloch for much aid in drawing up the descriptions 
and in selection of the names. I should also like to thank Dr. Tillyar 
of the Cawthron Institute, for dics help given in these and earlier papers. 
The chief generic characters of Agromyza as given by Mr. Malloch are— 
Generic Characters of Agromyza.t 
* Head of normal size; frons broad, from one-third to a little over 
one-half the head-width ; ocelli on a slightly raised portion; the ocellar 
UTTON, dug of the Diptera Brachycera of New Zealand, T'rans. N.Z. Inst., 
vol. “ 9 so 
Since е = above several specimens of P. albiceps have been reared from 
mined "pios ta ы, raria. 
H, A feris of the Species in Agromyza F Fallen and Cer ek г mes 
Annals of Ent. Soc. of America, vol. 6, p. 209-340, 1913. See also Маілосн, A Synopsis 
of the Genera of Agromyzidae, Proc. U.S. Nat. Mus., vol. 46, рр. 127-54, pl. 4-6, 1913. 
