British Species of May-flies of Anglers. 215 



male ; head, excepting an ochreous spot on the crown, thorax and abdo- 

 men black ; superior wings with a cupreous tint ; legs ochreous, thighs 

 griseous. 



Gen. 757. Silo Curt. 

 The maxillary palpi in the males divaricate, and sparingly clothed with 

 long subclavate hairs ; the four posterior tibia? have two pair of spurs on 

 each. 



I. pallipes Fab. Ent. Syst. 2. 76. 7. 



Gen. 759. Goera Hoff. MSS. 

 Maxillary palpi recurved, close to the head in the male?. 



A. Superior wings with one of the cells dilated and circular near the pos- 

 terior angle. 



4. flavipes Curt. 



] 1 lines : silky-ochreous ; thorax, abdomen, inferior wings and underside, 

 also the coxae and thighs fuscous; antennae brown, basal joint clothed with 

 ochreous hairs. 



1. pilosa Fab. Ent. Syst. 2. 76. 6. 



2. irrorata Curt. 



/lines: ochreous, pubescent; antennae piceous, slightly annulated with 

 ochre, the basal joint long, stout and very hairy ; wings very pale fuscous, 

 superior subochreous, with numerous indistinct whitish dots. 

 B. Superior wings with the same cell short. 



6. hirta Fab. Ent. Syst. 2. 80. 26. 



This may be the female of the next species ; and if so, it must be re- 

 moved to my genus Mormonia. 



Gen. 759 b . Mormonia Curt. 

 Resembling G. hirla, but the maxillary palpi are porrected, subclavate and 

 densely clothed with short hairs or scales in the males; three cells on the 

 inferior margin are free from transverse nervures, excepting towards the 

 base, where on the costa there is a densely hairy patch. 



5. gracilicornis Curt. 



10 lines: $ fuscous very pubescent; maxillary palpi and eyes black ; an- 

 tennae, legs and sometimes the body ochreous, the former dotted fuscous ; 

 wings with an ochreous tint. 



3. maculicornis Curt. 



10 lines: $ pale black, very pubescent; antennae ochreous annulated with 

 fuscous, labial palpi, underside of abdomen and legs tawny. 



Gen. 759 c . Brachycentrus Curt. 



Antennae remote at the base, shorter than the wings, stout in the male, 

 slender in the female : maxillary palpi short, divaricating and very hairy in 

 the male : wings rather broad and rounded, superior with a small dis- 

 coidal cell, from which spring three recurved nervures ; four posterior tibiae 

 with minute spurs at the apex and a smaller pair just above them. 



3. subnubila Curt. 

 10 lines : black ; head and thorax with woolly griseous hairs ; wings pale 

 fuscous, the nervures piceous, especially in the superior, which bear several 

 pale yellow spots on the stigma, the discoidal cell and one between each 

 ncrvure on the posterior margin ; tibiae and tarsi ochreous. 



