— 214 — 



Inter nostrates magnitudine et colore A. fenestratcc proxima, 

 sed differt alarum pictura et maculis abdominis niveis, quarura 2 

 exteriores in segmento tertio, 2 mediae in quarto positae. A. fe- 

 nestrata in singulo horum segmentorum fascia interrupta ejusdem 

 coloris ornatur. 



Thereva ursina N.Sp.: nigricans opaca supra dense nigro-, subtus 

 griseo-hirsuta, segmentis abdominis apiceanguste et fere aequali- 

 ter flavo-albidis, tibiis obscure rufescentibus, alis saturate infu- 

 scatis (ef), vel cinerascens opaca brevius et remotius hirsuta su- 

 pra grisea pilis nigris intermixtis subtus albida, vertice flavo- 

 griseo callis 2 parvis nigris nitidis parum elevatis in Iineam trans- 

 versam dispositis, thorace cinereo-albido-bivittato, segmentis ab- 

 dominis basi anguste subnitidis nigris, apice fascia albida opaca 

 ad latera latiori antice medio retusa, 2 ultimis totis nigris nitidis, 

 tibiis rufis, alis hyalinis fusco-nervosis (?). ef? long. 4 lin. 



Hab. ad Akersström prope Trollhättan Westrogothiae, Bobeman 

 (O*), ad Quickjock Lapponiae Lulensis 1843, Boheman (?) et ad 

 fluvium Tornensem inter cataractas Kattilakoski et Korpikoski d. 

 25 Jun. 1847, ipse (d*?). 



TA. plebejw et lugubri affinis, non nihil tamen major. Mas 

 corpore alisque obscurior, hirsutior, vertice, antennarum basi et 

 epistomate ad oculos nigro-hirsutis, barba grisescente, pilis nigris 

 intermixtis, lineis thoracis vix observandis. Femina callis verti- 

 cis parvis in Iineam transversam positis, nec callo magno obcor- 

 dato. Tarsi antici in utroque sexu nigri, vix summa basi 

 rufescentes. 



Obs. TA. vetula Zett. Holmias 1854 capta. 



Psilocephala eximia Zett. {Thereva eximia Meig.). Mas nondum de- 

 scriptus in foliis Coryli ad Ekenäs in insula Wermdö mox ante 

 solstitium aestivale inventus. A femina differt oculis approxima- 

 tis, interstitio tamen angusto distinctis, barba paullo longiori 

 alba nec nigra, abdomine minus attenuato, fasciis argenteis, vix 

 interruptis, in segmentis 2, 3, 5 et 6, nec maculis lateralibus 

 ejusdem coloris, ventre certo situ argenteo-micante et ano obtu- 

 siore, subhiante, segmento ultimo supra retuso, lamellas 2 bre- 

 ves, nigras in excisura continente, subtus genitalibus ferrugineis. 



PTIOLINA Staeg. 



Ut species novae ab antea desrriptis facilius distinguantur cha- 

 racteres omnium indigenarum hic recognitos affcrre lubet. 



Ptiolina obscura.- hirsuta nigra (q*) aut pubescens fusco-grisea 

 (S), subopaca, epistomate et basi antennarum pilis raris brevi- 

 bus munitis, articulo tertio ovali, palpis non dilatatis pilosis, 

 thorace obsolete fusco-3-lineato (?), abdomine nitidiusculo, pedi- 

 bus fusco-tcstaceis, alis dilule fuscescentibus stigmate saturatiori, 

 halterum clava fusca vel sordide albida. cf9- Long. Ii — 1^ lin. 



Pt. obscura Zett. — Leptis Fall. — Athrrix Meig. 



Hab. in Scania, Blekingia, Gotllandia, Bahusia et ad Hulmiam, 



BOHEMAI. 



