British Species of May-flies of Anglers. 121 



5. mellea Curl., a beautiful Pseudimago. 

 5i lines: bright ochreous, eyes black, segments of abdomen edged with 

 brown, with a trigonate brown mark on the back of each ; and the spiracles 

 forming a double row of black dots down each side ; filaments longer than 

 the insect, dotted with brown : wings pale yellow, costa a little darker, 

 nervures yellow and brown. 



5 a . straminea Curt., a Pseudimago. 

 4 lines : deep straw-colour, eyes black, segments of abdomen edged with 

 brown, wings fuscous-ochre, tarsi fuscous at the apex, filaments whitish 

 dotted with brown. 



8. flavesceus Curt., a Pseudimago. 

 Like the last, but only 2\ lines long. 



8 a . lateralis Curt. 

 Sir lines: piceous, shining, an orange spot before the wings; abdomen dull 

 ferruginous, the sides paler, with the spiracles piceous ; filaments very long : 

 wings with the 3 costal nervures rosy or ferruginous ; legs lurid, excepting 

 the anterior, which are ochreous at the base. 



9. semicolorata Curt. 



3 lines: ochreous, thorax variegated with brown, abdomen banded with 

 the same colour, filaments very long and slender, knees and tarsi brown, 

 superior wings with the basal half and inferior entirely pale yellowish brown. 



9 a . carnea Curt. 

 &$■ lines : ochreous, with a pink tinge, abdomen darker, filaments twice as 

 long as the insect, pale unspotted ; wings elongated, with the costa slightly 

 tinged, the nervures reddish brown. 



B. Wings very liitle reticulated. Pseudimago with the wings ciliated. 



11*. vermis Curt. 

 3' T lines : pale ferruginous ; head and thorax piceous above, with an ochre- 

 ous dot on each side the collar and several beneath the wings, filaments 

 twice as long as the insect, pale and dotted; legs dirty ochre; wings with 

 the costa tinged. 



ll b . autumnalis Curt. 



2 lines : pale castaneous brown ; margin of eyes and sides of thorax ochre- 

 ous; filaments thrice as long as the insect, whitish ; legs pale lurid; wings 

 with the anterior margin slightly tinged. Pseudimago more ochreous. 



Gen. 736. Cloeon Lea. 

 1. dipterum Linn., marmoratum Curt. 



8. obscurum Curt 

 The Pseudimago, I believe, of C. dipterum -. the wings are fuscous and ci- 

 liated. 



4. unicolore Curt. 



4 lines: reddish ochre ; filaments lost ; legs ochreous; costa pale brown 

 towards the tip ; nervures reddish ochre. 



6. dimidiatum Curt. 



3 lines : castaneous brown ; collar with an ochreous dot on each side ; ab- 

 dotn, n, especially at the base, banded with ochre; filaments very long and 

 white, remotely dotted with black; legs straw-colour ; nervures of wings 

 vcr\ faint. 



Third Series. Vol. 4. No. 20. Feb. 1834. R 



