132 CECIDOMYZIDiE. 



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). 



3. 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. o-viseola, 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. ; 

 Eondani. 8uhgeii. Lasiopte7'a el Cliiior/ii/ncha, hoew ; Winn. Tipnla 

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



Corpus parvum aut minimum. Caput parvum, rotundatum. Oculi 

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

 culati ; articuli primus et secundus crassiores ; tertius et quartus 

 tenuiores. Autemife 12-24-articulRt8e, poiTectse, submonililbrmes, 

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

 cumbentes, latse, pubesceutes, ciliata^ ; vence cuhitalis et suhapicalis 

 obsoletfe, subanalis distincta, analis plus rainusve obsolete fnrcata. 

 Abdomen cylindiicum, segraentis 8. Pedes plerumque longi, gra- 

 ciles, tarsis longissimis, metatarso sa^pissime 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. Antenna3 

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

 and the thorax together, submoniliform ; joints approximate, somewhat 

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

 in some species thickened, and concealing the mediastinal and subcostal 

 veins ; cuhital and suhajiical veins obsolete ; subanal distinct ; anal forked, 

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

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

 sus most often very short. 



The Lasiopterce infest plants, and are nearly similar to the 

 Cecidomi/ice in their habits and economy. The species are few in 

 number, and generally of rare occurrence. 



