414 ENTOMOLOGICAL NOTES. 



formed by the transverse and longitudinal black lines, to the 

 broad pale margins of the fore-wings, and lastly to the time of 

 its appearance, so different to that of either of the other 

 species, it having been taken by my father at Leominster, 

 in June, 1832, in a perfectly recent state, and had apparently 

 never flown. 



Class. — Hymenoptera. 

 Natural Order. — Sirecites, ined. 

 Genus. — Sirex. 

 Hujus quandoquidem generis descriptionem vix aptam invenies ; 

 integram, secundum partium nomenclaturam novam attentavi; 

 inde petens prseterea eandem explicare. Sirecis, maris caput 

 fere trigonum, antice rotundatum, postice paullo convexum est ; 

 antennis multi-articulatis, capite ad apicem pedetentim attenuanti- 

 bus ; oculis parvis vix prominentibus ; ocellis tribus in triangulo, 

 cujus apex anticus, dispositis; labro elongato lateribus medio, 

 convexis apice rotundato ; mandibulis corneis, rigidis, tridentatis ; 

 lingua tenui vix conspicua ; maxilUs linguiformibus hand corneis, 

 palpos duos minutos integros, ferentibus ; labio fere trigono, 

 anguHs rotundatis, palpos duos triarticidatos, articulo ultimo 

 longiore, ferente. Prothorax capite latior, antice paullo ad 

 capitem recipiendum, postice valde ad mesotboracem recipien- 

 dum, concavum, lateribus rectis ; bine medio valde attenuate, 

 lateribus latioribus. Mesothorax pyriformis, apice minori retro- 

 spiciente. Metathorax mesothorace minor, medio tenuissimo 

 lateribus dilatatis. Propodeon, segmentaque sequentia usque ad 

 telum clare pariterque patefacta. Telum minutum, fere trigonum, 

 apice acutissimo. Pedes mediocres ; femoribus brevissimis, angu- 

 latis ; protibiis, mesotibiisque curvatis, brevissimis ; metatibiis lon- 

 gioribus, angulatis, dilatatis ; tarsis quinque-articulatis, articulo 

 primo longissimo, quarto brevissimo, quinto mediocre ungues duos, 

 arcuatos, bidentatos ferente. Hujus generis neque proalae, neque 

 metalse, neque articulorum antennarum numerus, characteres ad 

 distinctionem pertinentes, sic mihi videtur, prsebent ; prseterea 

 distinctionis gratia segmentorum redundant figurationes. 



Sirex nigricornis. Mas. Antennce (20-articulatis) caput, 

 jirothorax, mesothorax , metathorax, propodeon, podeon, 

 metapodeonis margo anterior, mediusqiie disci chalyheo- 

 nigra : metapodeonis margo jJosterior lateribusque, octoon, 

 ennaton, decaton, p)rotelum, paratelumqiie ferruginea : telum 

 chalyheo -ferrugineum : coxce, trochanteresque nigra : 



