73^^3 6 



601. 

 HYDROPSYCHE FULVIPES. 



Order Trichoptera. Fam. Hydropsychida?. 



Type of the Genus, Pliilopotamus instabilis Curt. 

 Hydropsyche Pictet. — Philopotamus Cart. — Phryganea Gmel. 



Antennce inserted in front of the face, very slender, much longer 

 than the body, generally longer than the wings, composed of 

 numerous elongated joints, the basal one robust and subglobose, 

 2nd small (1). 



Labrum transverse, the sides notched, anterior margin convex, 

 with a lunate membranous pubescent margin (2). 

 Maxillary palpi long, hairy and 5-jointed, 4 basal joints robust, 

 1st oblong, 2nd twice as long, 3rd shorter subtrapezate, 4th as 

 long as the 2nd, 5th as long as the others united, slender, 

 slightly attenuated and wrinkled or composed of numerous 

 irregular transverse joints with long hairs on the inside (4). 

 Labial palpi not half the length of the maxillary, hairy and tri- 

 articulate, 2 basal joints stout somewhat obtrigonate, truncated 

 obliquely, 3rd twice as long, but more slender and filiform, 

 composed of numerous transverse irregular joints having a 

 wrinkled appearance (5). 

 Head transverse : eyes lateral and globose : ocelli undiscovered. 

 Thorax subovate. Abdomen short and linear in the male, termi- 

 nated by one central and 2 elongated incurved appendages beneath ; 

 more conical and simple in the female. Wings very much deflexed 

 in repose ; superior long, narrowed towards the base, truncated ob- 

 liquely, the apex rounded, with o furcate nervures on the posterior 

 margin; inferior ovate, with 2 furcate and a trifid nervure at the 

 centre (9 /). Legs, anterior short, hinder the longest ; tibiae, ante- 

 rior with 2 spurs at the apex (8), intermediate a little dilated in the 

 females, spurred at the apex, with a long pair above the middle (*) ,• 

 hinder with 2 pair of spurs, one pair a little above the apex (f) ■■ 

 tarsi 5-jointed, the intermediate compressed and dilated in the fe- 

 male (*) .- claws and pulvilli small. 

 Larvae not living in a case. Pupae with a simple envelope. Pictet. 



FuLviPES Curt. Guide, Gen. 75P. — nebulosa P^cM?. 



Dark brown ; antennae fulvous, annulated with brown ; head and 

 neck clothed with griseous hairs ; margins of abdominal segments 

 pale : superior wings yellow-brown with a rosy hue, obscurely 

 freckled with ochre, nervures dark, with a small dark dot on the 

 costa at the apex of the first furcate nervure ; inferior wings 

 similar in colour but iridescent and less yellow ; legs fulvous ; 

 thighs fuscous and sometimes the tibiae. 



In the Cabinets of Mr. Dale and the Author. 



As this group, which I gave as a section of Philopotamus in 

 the " Phil. Mag.", comprises the typical species of M.Pictet's 

 genus Hydropsyche, I have adopted his name : it is nearly re- 

 lated to Philopotamus and Polycentropus; but is distinguished 

 from the former by its much longer and slenderer antennae, 



