SiftiULiUM is a singular little genus, forming a link between 

 Molobriis and Scathopsc. Its aspect reminds us of Stylops^ 

 and it is not unlike Callomyia, the peculiar character of the 

 lexrs as well as the wings furnishino; a resemblance. These 

 minute insects fly in immense swarms in marshy and heathy 

 situations, and cause a most distressing irritation of the skin 

 and eyelids, when they alight on the face, which they occa- 

 sionally do in such numbers as to drive one away from the 

 spots they inhabit. The following are recorded as British 

 species. 



1. trifasciatum Curt. Brit. Ent. pi. 765 $. 



This specimen I took off a Sallow in June, at Niton in the 

 Isle of Wight. 



2. ornatum Meig. vol. 1. tab. 10. J". 6. — regelationis Meig. 

 Klas. 



3. reptans Linn. — Fries. Mon. tab. \.f. 6. 7, larva and pupa. 

 — Tipula erythrocephala DeG. 6. tab. 2S.f. 5. 6.(^. — seri- 

 ceum GmeL — argyropeza Meig. Klass. 



Found from March to November, Powerscourt waterfalls, 

 Mr. Davis ; and about ponds, bay of Belfast ; the females in 

 little swarms and very troublesome, Mr. Haliday ; Glanville's 

 Wootton, Mr. Dale ; Scotland, Mr. Lyell. The larvae live 

 in the stalks of Sium latifolium, pi. 750, and Phellatidrium 

 aquaticum. 



4. variegatum Hqff. — Hirtea livida Schel. t. 38. Jl 3. 



5. varium Meg. — Meig. v. 1 . j^- 292. 



6. lineatum Meig. 



July and Aug. Isle of Bute, Scotland. 



7. marginatum Meg. — fuscipes Fries. 



In myriads on the Ericae at Ramsdown in June and July, 

 when they tormented my face and eyelids: Aug. and Sept., 

 on trunks of fir trees. Parley-heath, and Castle Connel, Ire- 

 land. 



8. elegans Meig. July, on sedges on Thetford warren. 



9. auricomum Meg. Meig. 

 JO. latipes Meig. — aurea Fries. 



In abundance in October at Heron Court, settling on our 

 hats, also at Glanville's Wootton. 



1 1. nigrum Meig. 



Beginning of March, when a great number settled on a 

 white beaver hat at Cobham, Surrey. 



12. cinctum Meig. 6. 311. 14. April, Reading, Berks, Mr. 

 Davis. 



13. sericatum Meig. 6. 310. 13. 



For specimens of Limosella aquatica, Mudwort, I am 

 indebted to Mr. Kippist, who found them last Aug. at Gold- 

 ington green, Bedfordshire. 



