390 Mr. J. Hardy on the Primrose-leaf Miner, 
impossible to separate from the present, but which, in its pupa 
state, is very distinct; and the mode of mining adopted by the 
larva supplies another diversity. It is probably the PA. obscu- 
rella of Fallen (Phytomyz. iv. 8), which is char acterized in nearly 
the same terms: “ nigricans; proboscide halteribusque albis ; 
tibiis genubusve subpallidis.” Mr. Haliday bred PA. obscurella 
from the holly (Ent. Mag. iv. 147), and I obtained my specimens 
from pupz inclosed in the leaf of a honeysuckle, growing in the 
shade of that tree. In addition, I may remark, that a species 
supposed to be Ph. nigra was procured by Mr. Curtis (Brit. Ent. 
fol. 393) from pupz found by a lady under the leaves of the 
columbine ; and that Rennie observes that the leaves of the poly- 
anthus are occasionally affected in a manner similar to those of 
the primrose. 
From the examination of several species of these miners in 
their various states, I have been led to perceive that there are at 
least two generic forms included under the term Phytomyza, and 
which, although I do not find any tangible distinctive character 
in the perfect insects, I propose to separate on account of differ- 
ences in the pupa state, accompanied by a corresponding varia- 
tion in habit. To those with slipper-shaped pupz, whose trans- 
formations take place entirely within the leaf, I propose to apply 
the name Chromatomyia (xpapa, color ; zvia, musca) ; while the 
name Phytomyza may be retained for the species whose pupze are 
barrel-shaped, and whose larvee enter the ground to pass the pe- 
riod antecedent to their final change. The larva of one species, 
Ph. lateralis, is said to live and undergo its mutations in the 
interior of the heads of Pyrethrum inodorum (Curt. Brit. Ent. 
fol. 393) ; but whether this departure from the general habit is 
attended with a change of structure we are not informed. The 
species, whose complete history has been ascertaimed, stand as 
follows :— 
Curomatomyta, Hardy MSS. 
1. Ch. flaviceps. Phytomyza flaviceps, Macq. Dipt. (S. a Buffon) 
ii. 616. Larva subcutaneous in the leaves of the honeysuckle. 
2. Ch. nigra. Phytomyza nigra, Meg. vi. 191. Larva found in 
the leaves of the primrose. 
3. Ch. obscurella. Ph. obscurella, Fall., Meig. vi. 191. Larva 
lives in shapeless blotches in the leaves of the honeysuckle. 
4. Ch. cinereofrons, Hardy MSS. Nigro-cinerea ; hypostomate 
albo-infuscato ; proboscide albida ; fronte cinerea ; margimibus 
oculorum punctis nigris notatis ; ‘palpis, antennis, punctoque 
verticis nigris ; thorace scutelloque cinereis, opacis ; abdomine 
griseo- nigricante, nitido ; margine postico segmenti penultimi 
