HYDBOPSYCHID^E. 97 



tagona, anastomosi postica nulla, cubito bipartite, reliquis costulis 

 simplicibus. 



1. PLECTROTAESUS GRAVENHORSTII. 

 Plectrotarsus Gravenhorstii, Kol. Gen. et Sp. Trick. 94, 1. 



Var. Luteus, hirtissimus; capite supra, (interims, tarsisque nigris ; 

 alee anticte nigro-cyanece, basi costaque lutece, albo maculatce. 



Luteous, thickly clothed with luteous hairs : head above black, 

 thickly clothed with black hairs : antennae black, thick, joints coin- 

 pact : tarsi black : fore-wings bluish black, very hairy, marked with 

 white, more or less luteous at the base and along the fore border ; 

 hind-wings slightly luteous, blackish towards the tips. Length of 

 the body 4^ lines ; of the wings 11 lines. 



a, b. Van Dieman's Land. From Dr. Hooker's collection, 

 e. Van Dieman's Land. Presented by R. Butler, Esq. 

 d. Australia. From Mr. Argent's collection. 



Fain. 6. HYDEOPSYCHID^. 



Palpi maxillares articulo 3o elongato, filiformiT Antennae se- 

 taceae. Pedes calcarati. Alae anticae venis transversis vix ullis ; 

 posticae plicatae. 

 Hydropsychidae, Curt. ; Steph. Ill Brit. Ent. Hand. vi. 167; 



Burm. 

 Hydropsychides, Westw. 



Genus 1. CYENUS. 



Tibiae anticse tricalcaratae. Alae anticae venis transversis di- 

 versis. 



Cyrnus, Steph. III. Brit. Ent. Mand. vi. 174 ; Westw. 

 Hydropsy che p., Pictet. 



