IIYDEOPSYCHID.E. lUl 



Blackish, clothed with pale yellow hairs, ferruginous beneath 

 maxillary palpi testaceous ; 1st joint Mack : antenna; tawny, slout : 

 legs testaceous : wings gray, clothed with yellow down. Length oi 

 the body 2^ lines ; of the wings 7 lines. 

 a. United States. Presented by E. Doubleday, Esq. 



II. POLYCENTROPUS CBASSICOHNIS. 



Ferrvgineus, fiavo-h'irlus, suhtus testaceun ; antenna: fulvee, robm;- 

 t(c ; palpi pedesque testacei ; alcB siibcinereo', anticfcjlavo-pn- 

 hescentes et irroratcE. 

 Ferruginous, thickly clothed with yellow hairs, testaceous be- 

 neath : antennae tawny, robust : palpi and legs testaceous : wings 

 pale gray; fore-wings clothed with yellow down, adorned with nu- 

 merous pale yellow dots. Length of the body If — 2^ lines ; of thf 

 wings 6 — 8 lines. 



Var. /3. Fore-wings without dots. 

 a — e. Georgia. From Mr. Abbot's collection. 



12. PoLVCENTliOPUS INVARIUS. 



Fulvus^ aureo-hirttis ; antennis vertice thoracisque disco nigris , 

 pedes testacei ; aUe antica subfusca, posticce cinerea. 



Tawny, clothed with gilded hairs : crown of the head and disk 

 of the thorax black : autenucE black, a little longer than the body, 

 tawny at the base : legs testaceous : fore-wings brownish ; veins fer- 

 ruginous: hind-wings gray. Length of the body 2^ lines ; of the 

 wings 8 lines. 



a. Nova Scotia. From Lieut. Redman's collection. 



Genus 3. PLECTROCNEMIA. 



Antennae alis longiores. Tibia; antic^E tricalcaratie. .\Kt an 

 licae veuis transversis paucis. 



Plectrocncmia, Steph. III. Brit. Ent. Mand. vi. 1G8 ; Westiv. 

 Philopotamus p.. Curt. 

 Hydropsyche p., Pictet. 



