1878.] ^,, 251 



In the genus MYDiE.v (Aricia, pt. INIacq.), I found ten species, only 

 one of which was simiLar to any in Europe, viz., the common M. pagaun, 

 Fabr., which has a yellow scutellum. 



In Spilogaster, there were eleven species, one or two of which 

 closely resembled European species, but were, however, distinct. One 

 ily in this genus possessed several interesting characters, which deserve 

 especial notice. There was only one male in the collection, and it bore 

 a remarkable resemblance to Cyrtoneura {3L/ospiIa) medltahunda, Fabr. 

 The fifth longitudinal wing vein was curved \n a similar manner towards 

 the fourth vein, though in a less degree ; the spots upon the abdomen, 

 and the general colour, size, and appearance, were also very like those 

 of that iiy ; but it differed in having the eyes naked, and the arista 

 furnished with much shorter hairs. 



The genus Htdrophoria was represented by three species, all of 

 small size ; one of which was similar to M. mnhirjua, Fall. 



In the genus Drtmia, I found, as in Europe, one well-marked 

 species only, which exhibited all the peculiar characters seen in the 

 M. liamata of Fallen, but was quite distinct fi'om that common fly. 



I only found two species belonging to the genus Htdrot^a, both 

 of which seemed identical with the common European J/, dentipes, 

 Fabr., and M. armipes, Fall. 



The genus Lasiops contained two species, one closely resembling 

 L. cimctans, Meig. 



In Ophtra, there were two species, one of which appeared to be 

 identical with the well-known J£ leucostoma, Fall. 



The genus Limnophoea contained eight species, two or three of 

 which closely resembled European ones ; but none of them appeared 

 to be quite identical. In the European species of this family, of which 

 the A. compuncia, Wdm., is the type, the eyes of the males are some- 

 times separated by a rather wider space than is usual among the An- 

 thomyiidcB, except in Ocenosia, Lispa, &c., and this character was marked 

 in an exaggerated degree in all the American species, so that it was 

 difiicult to determine by the eyes alone, whether they should be placed 

 in the genus JLimnopliora or Coenosia. 



HoMALOMYiA : there were five species belonging to this genus, 

 three of which seemed identical with the common European 31, 

 canicularis, Lin., A. scalaris, Meig., and A. incisurata, Zett. It is 

 most probable that these common flies, wh.ich abound in and about our 

 houses in Europe, have been imported into America, like the house 

 flv, M. domesfica. 



