Miscellaneous. 357 



Mr, Newport added the following new species : — 



Pteronarcys californicus $ ; capite tboraceque saturate brunneis, 

 f route clypeo labroque rufis, oculis ocellisque nigris, segmentis thora- 

 cicis linea longitudinali interrupts flava, abdomine aurantiaco lateribus 

 brunneis, stylis caudalibus basi flavis, antennis pedibusque totis atris, 

 alis obscuris nigro-nervosis sed absque macula stigmali. 



Hab. in California (D. Hartweg). 



The following apparently new species of Canadian Perlida were 

 described, with remarks on the habits of each as observed by Mr. 

 Barnston. 



1. Perla citronella (Barnston MSS.) ; saturate flava, antennarum 

 articulis 33-35, oculis ocellisque brunneis, alis hyalinis pallide luteis 

 margine costali flavis, abdominis dorso brunneo. — Long. lin. 3-3^. 



Hab. in Canada, ad Albany River, latit. 54°. 



2. Perla minima (Barnston MSS.) ; nigra nitida, antennarum articulis 

 circa 26 submoniliformibus pilosis, fronte paululum excavato, palpis 

 subclavatis, tborace angusto subquadrato, stylis caudalibus 13-articu- 

 latis, alis obscuris nigro-nervosis in mari brevibus obtusis abdomen 

 semicooperientibus in fcemina amplis corpore longioribus. — Long, 

 lin. lf-2. 



Hab. in Canada, ad Albany River. 



3. Capnia vernalis, Newp. ; nigra nitida pilosa, thorace postice rotun- 

 dato, antennarum articulis 30-33 pubescentibus, alis obscuris pilosius- 

 culis nervis magnis nigris, stylis caudalibus subulatis 21-23-articulatis. 

 — Long. lin. 2|. 



Perla vernalis, Barnston MSS. 

 Hab. in Canada, ad Albany River. 



The fourth species, distinguished from most other Nemource by the 

 short anterior wings of the male, the author proposed to join with 

 Nemoura trifasciata, Pictet, which is similarly formed, in a subgenus 

 for which he proposed the name Brachyptera. 



4. Nemoura (Brachyptera) glacialis (Barnston MSS.). Mas saturate 

 brunneus fere niger, thoracis margine anteriore recto, alis ante- 

 rioribus triangularibus rudimentalibus segmentum abdominale pri- 

 mum tantiim attingentibus ; posterioribus albidis longissimis acutis 

 emarcidis decussatis, antennis elongatis pubescentibus 53-56-articu- 

 latis, pedibus longis compressis cursoriis; paris postremi longissimis, 

 abdominis segmento terminali lato piano pubescente. 



Foemina multo major, in reliquis tamen similis, capite paululum excavato, 



alis amplis obscure brunneis nigro-nervosis. — Long. unc. §. 

 Hab. in Canada, ad Albany River. > 



MISCELLANEOUS. 



How to prevent the Attacks of the Bed-bug, Cimex lectularius. 

 By John Blackwall, F.L.S. 



So numerous and important are the advantages which result from 

 an exact and comprehensive knowledge of entomology, that few 

 persons of liberal education, in the present day, are disposed to 



