igooj Harrington — Fauna Ottavvaensis. 131 



Rhamphomyia laevig-ata, Loew. U. S. Nat. Mus. 



DOLICHOPODIDyE. 



Psilopus caudatiilus, Loew. U. S. Nat. Mus. 

 Psilopus patibulatus, Sa)'. A very common species. 

 Dolichopus laticornis, Loew. Less often observed. 

 Dolichopiis albiciliatus, Loew. U. S. Nat. Mus. 

 Dolichopus incisuralis, Loew. U. S. Nat. Mus. 



CONOPID.^. 

 Physocepiiala furcillata, Will. Common upon g-oldenrods. 

 Myopa vesiculosa, Say. Two specimens. 

 Myopa obliquefasciata, Macq. One specimen. 

 Zodion fulvifrons, Say. One specimen. 

 Oncomyia abbreviata, Loew. One specimen. 

 Dalmannia nig^riceps, Loew. L^ S. Nat. Mus. 



Syrphid/E. 



Chrysog-aster pictipennis, Loew. Common in May. 



Chrysogaster pulchella, Will. Also common. 



Paragus angustifrons, Loew. U. S. Nat. Mus. 



Paragus bicolor, Fabr. Occurs from May to September. 



Xylota anthreas, Walk. One bred from puparium found under stone. 



Xylota pigra, Fabr. A common and handsome species. 



Xylota curvipes, Loew. This fine insect is less abundant. 



Xylota ejuncida, Say. Several specimens. 



Syrphus arcuatus, Fall. Rare. 



Syrphus torvus, O. S. Rare. 



Syrphus ribesi, Linn. Four specimens taken in June and Jul}'. 



Syrphus disjectus. Will One specimen. 



Syrphus umbellatarum, Schin. One specimen. 



Melanostoma mellinum, Linn. Rather common. 



Melanostoma obscurum, Say. Two captured in July. 



Platychirus quadratus, Say. Common. 



Pyrophaena ocymi, Fabr. Only two specimens observed. 



Sphserophoria cylindrica, Say. Very common. 



Mesogramma parvula, Loew. Rare ; July and August. 



Mesogramma geminata, Say. Two speciniens, June and July. 



Neoascia globosa, Walk. Several in middle of J"ne. 



Syritta pipiens, Linn. Somewhat abundant May and June. 



Rhingia nasica, Say. Common in May ; taken also in August. 



Helophilus conostomus, Will. Common. Found dead in Cypripedium. 



Helophiius laetus, Loew. One specimen in June. 



Helophilus bilinearis, Will. One specimen in May. 



Helophilus similis, Macq. Three specimens of this large species. 



Helophilus, n. sp. ? U. S. Nat. Mus. 



