87 



NOTES UPON PHYTOMYZA CHMROPHYLLI, Kalt. 

 By Peter Inchbald, F.L.S., and K. H. Meade. 



At the close of December, 1888, I recently gave some 

 account (Entom. xxii.) of the habits of this mining Dipteron, in 

 the pupa-condition of life, giving the food-plant, and its singular 

 tunnel in the leaflet-segments of the Chcerophyllum temulum and 

 other allied species. I looked for it to put on wings in the 

 spring, but I did not expect to see it until April or even May. 

 Several, however, have emerged from their pupa-cases in 

 February. I have reared nearly a dozen, both males and females, 

 and narrowly watched their development. Two broods thus 

 occur in the year, in spring and autumn. 



Kaltenbach was, I believe, the first to rear the tiny Miner, and 

 after him our fellow-countryman Hardy, who characterised it by 

 the generic name of Chroinatomyia, from its peculiarly-shaped 

 pupa-case. I sent living imagines to Dr. Meade, who has 

 furnished me, most kindly, with an admirable diagnosis of the 

 fly, which will be appreciated by all who study the minuter forms 

 of Dipterous life. 



Peter Inchbald. 

 Grosvenor Terrace, Hornsea, Holderness, February 16, 1889. 



Phytomyza (Chromatomyia, Hardy*) chcerophylli, Kalt. 

 Nigro-cinerea obscura ; ventro pallido uigro-fasciato ; proboscide hal- 

 teribusque albidis; pedibus cinereis, geuubus prioribus flavidis ; alis sub- 

 ciuereo-hyalinis, veuis long. 4 tis pone apicem excurrentibus. Long. $ et 

 5 1 — 1^ mm. (circiter f lin). Dull grey ; e3'es red (in life) ; head, face, 

 palpi, and antenute, black ; proboscis pale yellow ; thorax, with scutellum, 

 dark grey, without lustre, with a few long whitish hairs upon the sides ; and 

 two rows of fine dorso-central bristles rather wide apart, seated upon very 

 minute black spots. Abdomen dull blackish grey upon the dorsum, and 

 yellowish white beneath. The posterior edges of the segments are marked 

 upon the back with very fine pale transverse lines, which coalesce on the 

 sides with the white ventral surface. The latter is furnished down the 

 centre with a series of quadrate black spots. The anal segment in the 

 male is small, round, prominent and shining black. Halteres large and 

 milk-white. Legs wholly black-grey, with the exception of the knees and 

 roots of the tibiae of the front pair, which are pale yellow ; the extremities 

 of the knees of the posterior pairs show a yellow point in some specimens. 

 Wings hyaline, with a slightly dusky hue; the costa and three first longi- 

 tudinal veins are robust and black ; the fourth and fifth longitudinal 

 are paler, but quite distinct ; and the anal vein is well developed, and 

 extends about two-thirds of the way to the margin of the wing. The 

 transverse vein is single and very short ; the third longitudinal reaches the 



* Hardy separated the species of Phytomyza of Fallen into two genera, on 

 account of the different forms of the pupae, wliich in some are barrel-shaped, in 

 others shpper-formed. The former lie termed Cliromatoniyice, the latter Phytomi/zte 

 (Annals of Nat. Hist., W. 385). 



