195 



2. SlALIS INFLTMATUS. 



Niger ; ales, vix hyalines, nigro punctate, basi pracipue infuscatce. 



Sialis infumatus, Newm. Ent. Mag. v. 500. 



Semblis ainericanus, Ramb. Hist. Nat. Ins. Neur. 447, 1. 



a c< United States. Presented by the Entomological Club. 



d. St. Martin's Falls, Albany River, Hudson's Bay. Presented by 



G. Barnston, Esq. 



e. Arctic America. Presented by Sir John Richardson. 

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



g. Georgia. From Mr. Abbot's collection. 



3. SIALIS FERRUGINEUS. 



Ferrugineus ; capitis vertex nigricans, vittis maculisque flams ; 

 antenncB nigrcB ; abdomen nigrum, apice ferrugineum ; pedes 

 picei, coxis femoribusque ferrugineis : alee pallide fuscescente- 

 cinerece. 



Ferruginous : vertex of the head blackish, with several more or 

 less interrupted yellow stripes : some yellow spots between the an- 

 tennae and about the mouth : palpi piceous : antennae black, very 

 pubescent : abdomen black, with a ferruginous tip : legs piceous ; 

 coxae and femora ferruginous : wings pale brownish gray ; veins pi- 

 ceous. Length of the body 3J lines ; of the wings Hi lines. 



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



Genus 2. ITHONE. 



Caput porrectum, fere rotundatum, corpore paullo angustius. 

 Antennae setaceae, corpore paullo breviores, basi approximates, 

 multi-articulatae ; articulo basali magno, rotundato, caeteris valde 

 minoribus, subaequalibus. Oculi mediocres, rotundati, Labrum 

 obtusurn, setosum, medio subemarginatum. Mandibulae elongatae, 

 apice acutae, paullo incurvae, haud dentatae ; maxillarum lacinia ob- 

 tusa, apice membranacea, intus pilosa ; galea tenuis, lacinia vix 

 brevior. Palpi maxillares 5-articulati, articulo lo 2oque brevissi- 

 mis, caeteris longioribus subaequalibus. Maxilla extus setis rigidis 

 instructa. Labium membranaceum, rugosum quasi desiccatum ; 

 palpi labiales 3-articulati, articuli breves subaequales. Prothorax 

 transversus, brevis, capite latior. Mesothorax fere quadra tus. 



