PHYTOMYZA. 245 



c. Front black. 

 d. Wings greyisb. 



e. Body black. Species 2. 

 e e. Body greyisb-black. Species 3, 4. 

 d d. Wings white. Species 5. 

 c c. Front pale. Species 6. 



d. Legs black ; femora yellowisb. Species 7. 

 d d. Legs yellow. Species 8. 

 b b. Body pale. 



c. Thorax with three grey stripes. Species 9. 



c c. Thorax without stripes. Species 10. 



c c c. Thorax with three luteous stripes. Species 11. 



1. lateralis. Pal. Phytomyz. 3. 2 (1820) ; Meig. ; Mcq. ; Zett.— 

 SoficM, Desv. Nigro-cinerea, capite, thoracis vittis lateraUbus, halteri- 

 bus, abdominis suturis, genubusque flavis, vertice nigro, alls sublim- 

 pidis. Long. 1^ ; alar. 3 lin. 



Greyish-black. Head yellow in Iront, pale-yellow beneath, and with 

 two pale-yellow stripes on the vertex ; triangle of tbe ocelli black. 

 Antennpe deep-black. Thorax and abdomen with a slender yellow 

 stripe on each side. Wings nearly limpid ; veins black, yellow towards 

 the base ; prsebrachial vein ending at very little behind the tip of the 

 wing. Halteres pale-yellow. Hind borders of the abdominal segments 

 yellow, especially towards the tip. Legs black; knees yellow. Fetn. 

 Abdomen subfiisiform. 



Common. (E. S. I.) 



2. Aquifolii, Gom-eau, MSS. ; Desv. Rev. et Mag. Zool. 1851 

 (1851). Nigra, setosa, alls cinereis, lialteribus flavis, genubus albidis. 

 Long. 1 ; alar. 2^ lin. 



Black, bristly. Wings grey ; veins black, yellow at the base ; cubi- 

 tal vein ending much nearer to the tip of the wing than to the tip of 

 the radial ; pra?brachial vein ending at a little behind the tip. Halteres 

 pale-yellow. Abdomen rather hairy. Legs black ; knees dingy-wliite. 



Common; appears in May. The larva undermines and feeds 

 on hollj leaves. (E. S. I.) 



3. obscurella, Pal. Phytomyz. 4. 8 (1820); Meig.; Mcq.; Zett. 

 Nigro-cinerea, gracilis, alis subcinereis, halteribus albo-flavescentibus ; 

 Fcem. abdomine subfusiforvii. Long. |— 1 ; alar. 2-2^ lin. 



Greyish-black, slightly bristly. Antennre black ; third joint round. 

 Wings greyish ; veins black ; cubital vein endiwj as near to the radial as 

 to the tip of the wing; pra?braehial ending on the hind border very 

 near the tip. Halteres yellowish-white. Legs black. Fem. Abdomen 

 subftisiform. 



Abundant in the spring. (E. S. I.) 



4. nigra? Meig. Zw. vi, 191. 7 (1830). Nigro-cinerea, vix gra- 



