202 SIALIM. 



only at the tip of the second joint of the maxillary palpi ; external 

 part thick, furnished with thick-set hairs along a part of the length, 

 shorter than the other part : antennae simple : first and fifth joints of 

 the tarsi longer than the others ; fourth a little shorter than the 

 third. 



The species included in this genus agree in having simple an- 

 tennae, but some of them are allied to Perla, others to Sialis or to 

 Chauliodes, and a few to Raphidia. 



1. HEKMES MACULATUS. 



Fusco-niger ; capite et prothorace rufis ; aide fusees, venis nonnullis 

 transversis albis, anticce macula ad costam triangulari alba. 



Chauliodes serricornis, Say, Keating and Long's Expedition to the 



Source of St. Peters River, ii. Appendix 47 ; Journ. Acad. 



Nat. Sci. Philad. ii. Append. 307; Burm. Handb. Ent. ii. 



949,1. 

 Neuromus maculatus, Ramb. Hist. Nat. Ins. Neur. 442, 3, pi. 10, 



f.2. 



Body pitchy: head red, much longer than broad, a little 

 broader in front, striated longitudinally, longer and a little broader 

 than the prothorax : eyes hardly prominent : antennae black, slightly 

 serrated : prothorax red, slightly longer than broad, piceous on each 

 side and in front, indistinctly ridged towards the hind border, a little 

 narrower in front than behind, slightly impressed on each side : wings 

 dark brown, paler towards the tips and along the hind borders, adorn- 

 ed with numerous white spots which are largest and most confluent 

 across the middle of the fore-wings and towards the tips of the 

 hind-wings; marginal region with 18 21 transverse veins. 



a. North America. Presented by Henry Jones, Esq. 



b. North America. Presented by the Entomological Club. 



c. North America. 



d. e. ? 



2. HERMES RUFICOLLIS. 



Niger ; capite et prothorace rufis, hujus disco nonnunquam nigro ; 

 femora ferruginea ; alee fuscce, maculis nonnullis basique 

 albis. 



Chauliodes (Hermes) maculipennis, G. R. Gray, Edit. Cuv. Anim. 

 Kingd. ii. 331, 332, pi. 72, f. 1. 



