with notice of a new Genus of Diptera. 391 
arcte subalbido; vitta laterali parva albo-flavescente ; ventre, 
plaga minime interrupta gradatim laxata nigra nitida, in- 
structo ; pedibus nigris, genubus strictius albidis ; halteribus 
albis ; alis hyalinis, ad bases exalbidis, nervo transverso sin- 
gulo. Long. corp. lin. 3. 
This is nearly allied to the next. The larva mines the leaves 
of barley. Two examples of the fly have been obtained. 
5. Ch. Syngenesie, Hardy MSS. Nigro-cinerea; hypostomate 
proboscidegue albis ; fronte albo-flavescente ; margimum ocu- 
Jorum punctorum serie, puncto verticis, antennis palpisque 
nigris ; dorso thoracis, cumque scutello, cinereis, opacis, late- 
ribus autem cinereo-nigricantibus; abdomine griseo-nigricante, 
marginibus posticis segmentorum quatuor primorum, anguste, 
quinti paulo amplius exalbidis; vitta laterali late alba; ventre 
nitidy, incisuris albis, medio, plaga longitudinali macularum 
nigrarum, ornato, quarum prima quadrata, relique parallelo- 
grammice, margine postico quinte interdum circulatim sinu- 
ato; segmento ultimo toto nigro; pedibus nigris, genubus 
albidis ; halteribus albis; alis hyalinis, ad bases exalbidis, 
nervo transverso singulo. Long. corp. lin. 3-1. 
The larva subsists within the leaves of the groundsel (Senecio 
vulgaris), of the ragwort (S. Jacobea), of the field-thistle (Cnicus 
arvensis), and of the sow-thistle (Sonchus oleraceus). The wind- 
ing galleries which it traces in such an elegant manner round 
the edges of the leaves of the smooth-leaved maritime variety of 
the plant last-mentioned, appear to be represented in the ‘ Hi- 
story of Insects,’ 1. 298. fig. 1 (Family Library, no. 7) ; but the 
figure scarcely gives any idea of their exceeding neatness. I have 
it likewise from leaves of Cineraria, sent from Linlithgowshire. 
The size is constant, which will separate it from the next, said 
to be 14 line long; and the colouring of the head, halteres, &e. 
appears to be much fainter than in Ch. nigricornis. 
6. Ch. nigricornis. Ph. nigricornis, Macq. Dipt. (S. a@ B.) 1. 
618. Larva lives in the interior of the leaves of cinerarias and 
turnips. Curt. Gard. Chron. Feb. 22, 1845, p. 117. 
7. Ch.? Ilicis. Ph. Wlicis, Curt. Gard. Chron. July 4, 1846, 
p. 444. Larva found beneath the leaves of the holly. Curt. lc. 
I have likewise obtained the pupz of a species from the leaves 
of Holcus lanatus, but they proved abortive; and I have others 
from the leaves of the holly, from which the fly has not yet pro- 
ceeded. 
Puytomyza, Fallen, Meig. 
1. Ph. flava, Fall., Meig. vi. 196. Larva a miner of the leaves 
of the buttercup (Ranunculus repens), of the bachelor’s buttons 
