UNDESCRIBED SPECIES OF MUSCID^. 149 



that the larvae feed among the decayed mortar. I have found 

 it in Dublin, but always in winter, and have received English 

 specimens from my friends, Mr. Curtis and Mr. F. Walker. 

 Teichomyza can only be considered as a section of the genus 

 Ephydra, Fallen. 



Herbina suilUoidea (Rob. D. p. 698, No. I.) is the insect 

 which I referred to in Vol. I. of this Magazine, as perhaps a 

 variety oi Helomyza ustidata, from which I believe it is quite 

 distinct. It occurs, but rarely, in Ireland and the Western 

 Isles, in the same situations with Helomyza tigrina,^ from 

 which, at first sight, it differs only by the more hoary tinge 

 and generally inferior size. When examined with a lens, the 

 pubescent arista at once discriminates the species. 



2. Characters of some undescribed Species of the Family 



Muscidce. 



I. Calypterati, R. D. 



Trie.— MusciD^, R. D. 



Gen. — MuscA, Meig. 



Subgen. — Morellia, R. D. 



Sp. 1. M. M. hortorum. Calyptris infumatis. 



Musca hortorum. Fall. Muse. 52, No. 33. 



In the male, the fore and middle shanks are nearly naked : the fore- 

 thighs ciliate beneath : the hind-shanks scarcely curved, having a 

 few long hairs on the inside, below the middle. 



Sp. 2. M. M. importuna. Calyptris albis. 



Morellia agilis, Rob. D. 405, No. I. ? 



In the male, the fore-thighs are thickly bearded below : the fore- 

 shanks clothed with short thick hair on the inside, and tufted 

 with long hairs behind, from the middle downwards. The middle- 

 thighs have a larger tuft at the tip, and the shanks are thicker, 

 with the down on the outside standing up. The hind-shanks 



<^ Stiillia communis of Rob. Dcsvoidy, but not Musca suilla, F., which scemj; 

 rather to be identical with Helomyza ncmornm. 

 NO, II. VOL. IV. X 



