HVDROPSYCHIDiE. 97 



tagona, anastomosi postica nulla, cubito bipartite, reliquis costulis 

 simplicibus. 



1. Plectrotarsus G raven horstii. 

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



V;ir. Luteus, hirlmhniis ; capite supra, antennU, tarsisque niyris ; 

 alee anticfB nigro-cyanea, hasi costaque lutecB^ alho maculata. 



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

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

 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, h. Van Dieman's Land. From Dr. Hooker's collection. 



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



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



Fam. 6. HYDROPSYCHID.E. 



Palpi maxillares articulo 3o elongato, filifoiTni. Antennae se- 

 tacea?. Pedes calcarati. Alaj antics venis transversis vix uUis : 

 posticae plicatae. 



Hydvopsychid-E, Curt.; Steph. III. Brit. Ent. Mand. vi. 1«>7; 



Burm. 

 Hydropsychides, Westw. 



Genus 1. CYRNUS. 



Tibiae anticDD tricalcaratae. Alae anticae venis transversis di- 

 versis. 



Cyrnus, Steph. III. Brit. Ent. Mand. vi. 171 ; Westw. 

 Hydropsyche p., Pictet. 



