132 CECIDOMYZIDjE. 



Many other species have been described, but their economy has 

 not been ascertained, and the characters assigned to them are not 

 sufficiently definite. 



The following additional species have been recorded as British : 



1. C. grandis, Meig. Zw. i. 94. 1 (1818). 



2. C. lateralis, Meig. Zw. i. 96. 5 (1818). 



3. C. palustris, Linn. Faun. Suec. 1775 (1761). 



4. C. nigricollis, Meig. Zw. i. 97. 8 (1818). 



5. C. griseola, Meig. Zw. i. 97. 9 (1818). 



6. C. griseicollis, Meig. Zw. i. 97. 10 (1818). 



7. C. bicolor, Meig. Zw. i. 98. 12 (1818). 



8. C. carnea, Meig. Zw. i. 98. 13 (1818). 



9. C. fuscipennis, Meig. Zw. i. 98. 14 (1818). 



10. C. lutea, Meig. Zw. i. 99. 16 (1818). 



11. C. pictipennis, Meig. Zw. vi. 270. 27 (1830). 



Genus II. LASIOPTERA. 



LASIOPTERA p., Meig. Zw. i. 88 (1818) ; Mcq. ; Zett. ; Loew ; Winn. ; 

 Rondani. Subgeu. Lasioptera et ClinorJiyncha, Loew ; Winn. Tipula 

 p., Schr. Cecidomyia p., Meig. Kl. Zw. 



Corpus parvum aut minimum. Caput parvum, rotundatum. Oculi 

 lunati. Ocelli mdli. Proboscis brevissima. Palpi exserti, 4-arti- 

 culati ; articuli primus et secundus crassiores ; tertius et quartus 

 tenuiores. AutennaB 12-24-articulatse, porrectas, submomliformes, 

 corpore breviores, articulis approximatis. Thorax ovatus. Ala in- 

 cumbentes, latse, pubescentes, ciliataB; vents cubitalis et subapicalis 

 obsolete, subanalis distincta, analis plus minusve obsolete furcata. 

 Abdomen cylindricum, segmentis 8. Pedes plerumque longi, gra- 

 ciles, tarsis longissimis, metatarso saapissime brevissimo. 

 Body delicate, small or very small. Head small, sphseroidal, sessile. 

 Eyes lunate. Ocelli none. Proboscis very short. Palpi exserted, 

 four-jointed ; first and second joints thicker than the others. Antennas 

 porrect, twelve- to twenty-four-jointed, not much longer than the head 

 and the thorax together, submoniliform ; joints approximate, somewhat 

 hairy. Thorax oval. Wings incumbent, broad, hairy, ciliated; costa 

 in some species thickened, and concealing the mediastinal and subcostal 

 veins ; cubital and subapical veins obsolete ; subanal distinct ; anal forked, 

 the first branch indistinct or obsolete. Abdomen cylindrical, with eight 

 segments. Legs generally long and slender ; tarsi very long ; metatar- 

 sus most often very short. 



The Lasioptera infest plants, and are nearly similar to the 

 Cecidomyia in their habits and economy. The species are few in 

 number, and generally of rare occurrence. 



