1904. J 199 



black friiiij;('(l liiiul femora, slim'tcr bi-oadec laniell.'e, which luive a 

 broader blackish tip and arc not so densely ihouj^h more coarsely 

 liairy, and hind tibiae dilated, though the black costal swelling is very 

 similar. 



Still more closely allied seem to be D. coiisimilis and D. cruralis 

 of Wahlberg. These two species were taken by AVahlberg about the 

 middle of July, 1S45, in a deep marsh under the mountain Snjcrak 

 in La[)land, and Stenhammar took D. consimilis about the same date 

 in a large marsh in Ostrogothia. 



D. comimilis appears to differ from D. laticola in I lie followiiii; characters: — 

 " Pedibus iiigris, trochanteribus geniculis suinmis ct sumiiia basi metatarsoruin 



" anteriortun testacois stigmate nuUo laniellis parvis oblique obovatis, fusco- 



" (lavescentibus, margine cum ciliis loiigiuseulis, tenuibus saturatius iiifuscato," and 

 later on " lamellis fere totis iiifuscatis ab illo (= picipes) tamen diversus." These 

 characters seem to point to a species with blacker legs and darker lamellfB, wliile 

 the absence of a black costal swelling is a character not likely to be overlooked by 

 Wahlberg, even though the swelling might be but small. 



D. cruralis is said to have " tibiis posticis extus obscure testaceis, apice ad ter- 



" tiam partem indeterminate nigris lamellis minoribus, oblique rotundatis, sor- 



" dide flavcsccntibus, modice late et indeterminate fusco-marginatis brevitcr et 

 " dense griseo-ciliatis nigroque uncinatis ; femoribus posticis subtus breviter nigro- 



" ciliatis," and later on " femoribus posticis brevitcr nee longe ciliatis tibiis pos- 



" ticis obscure testaceis intus nigricantibus " lamellis dense ct breviter ciliatis." 



These characters seem to point to a species with paler hind tibiic, more margined 

 and more hairy lamellae, and with hind femora bearing a more obvious cilia. 



I am unable to trace any other species with which D. laticola 

 requires anj'^ comparison. 



I took two males at Ormesby Broad in Norfolk on June 28th, 

 1888. If my memory serves me true they were taken in marshy 

 rushy ground near the north-west corner of the Broad. 

 9. D. ntripes Meig. : not uncommon from Penzance to Braemar. 



10. D. phccopus Hal. : in fair numbers near Poole in Dorset on July 



9th, 1871. 



11. D. vitrlpennis Meig. : common everywhere in marshy localities. 



12. D. claviger Stann. : this and the two following species are closely 



allied, and form a natural group of elegant flies with long 

 legs and with the last joint of the front tarsi formed into a 

 small disc. D. clavi(jer is by no means common except 

 locally, but I have caught it from Devonshire to Sunderland. 



13. D. dlscifer Stann. : this is the commonest of the three species, 



and occurs from Ivybridge to Lairg. 

 (To be continued j. 



