LIST OF DIPTERA. 127 



armed with four long tawny teeth : fore and middle legs pale tawny, 

 tips of their feet brown, their thighs brown, excepting the base; 

 hind legs piceous, their feet brown, excepting the first joint, which, 

 like the thighs at the base and the knees, is white : wings colour- 

 less from the base to the middle, brown thence to the tips ; brand 

 dark brown, terminated by a colourless spot ; veins brown : poisers 

 pale tawny. Length of the body 6 lines ; of the wings 10 lines. 



a. New Holland. Presented by J. Hunter, Esq. 



b. New South Wales. From Mr Wood's collection. 



Beris quadridentata, Barnstons MSS., mas. et fern. Viridis, ab- 

 domine nigro-cupreo, antennis nigris, pedibus fulvis, tibiis posti- 

 cis fuscis, tar sis posticis basi nigns, alls limpidis. 



Head and chest green, shining: eyes dark red : feelers black: 

 abdomen dark bronze : scutcheon of the male with four, of the fe- 

 male with six teeth : legs tawny ; hips, tips of feet and of hind 

 thighs brown ; hind shanks, excepting the base, also brown ; first 

 joint of hind feet white: wings colourless; veins tawny; brands 

 brown ; poisers pale yellow. Length of the body 2 — 2| lines ; of 

 the wings 4| — 5 lines. 



Var. 1. Head and chest greenish blue. 

 Var. 2. Head and chest purplish blue. 

 Var. 3. Head bright purple. 



a. St. Martin's Falls, Albany Eiver, Hudson's Bay. Presented by 

 G. Barnston, Esq. 



Beris lata, n. s., fern. Scutello inermi, abdominis disco fulvo, an- 

 tennis pedibusque fulvis, Wis apice nigris, tarsis tibiisque anti- 

 cis et tibiis posticis fuscis, alis limpidis. 



Body black, dimly shining : eyes dark piceous : feelers tawny, 

 with black tips : scutcheon unarmed : disk of the abdomen dark 

 tawny : legs tawny ; fore feet and fore shanks, excepting the base of 

 the latter, brown ; hind shanks and tips of middle feet brown ; hind 

 feet pale tawny, with brown tips : wings colourless, pale tawny along 

 the fore border ; veins tawny ; brands pale brown ; poisers yellow, 

 with a large piceous spot at the base of each knob. Length of the 

 body 2| lines ; of the wings 4j lines. 



a. New York. Presented by the Entomological Club. 



Beris brevis, n. s., fern. Nigra, abdomine livido, margine piceo, 

 antennis fulvis apice fuscis, pedibus fulvis, tibiis posticis fuscis, 

 alis limpidis. 



Body black, dimly shining : eyes dark piceous : feelers tawny, 

 with black tips : abdomen livid ; its border piceous : legs tawny ; 



