4 LIST OF DIPTERA. 



Culex excitans, n. s., fern, Flavo-fuscus, argenteo micans, thorace 

 albo hirto, abdomine albo fasciato, pedibus nigro-fuscis, femori- 

 busflavis, genubus tarsorumque articulis 1° et 2° basi albis, alis 

 limpidis. 



Body pale yellowish brown, adorned with silvery lustre on 

 each side : feelers and mouth dark brown ; tip of the latter black : 

 chest clothed with white hairs : abdomen with a band of white hairs 

 on the fore-border of each segment : legs dark brown ; base of the 

 first and of the second joints of the feet white ; knees also white ; 

 thighs yellow, with brown tips : wings colourless ; veins brown ; 

 poisers yellow. Length of the body 2 lines ; of the wings 4 lines. 



a. Georgia. From Mr. Abbot's collection. 



Culex stimulans, n. s., fern. Fusco-rufus, capite thoraceque flavo 

 hirtis, abdominis segmentis flavo-cinctis, pedibus fuscis, tarsis 

 nigris, flavo-cinctis, alis limpidis. 



Body brownish red : head and chest clothed with yellow hairs : 

 mouth and feelers dark brown : each segment of the abdomen with 

 a band of yellow hairs on the fore border, and with a few longer 

 yellow hairs on the hind border: thighs pale brown, with black 

 tips; shanks darker brown ; feet black, base of each joint pale yel- 

 low : wings colourless ; veins tawny ; poisers pale yellow, with 

 tawny tips. Length of the body 2J lines ; of the wings 5 lines. 



a. Nova Scotia. From Lieut. Bedman's collection. 



Culex formosus, n. s., fern. 



Deep rich brown : head much adorned with silvery spangles, 

 as is also the chest, where they form four stripes, of which the inner 

 pair are straight and narrow, the outer pair broad and curved : ab- 

 domen also adorned with silvery spangles : mouth black : feelers 

 brown : eyes dark red : legs brown, beset here and there /with sil- 

 very marks ; knees and rings of feet silvery : wings somewhat gray ; 

 veins brown, very thickly feathered ; poisers yellow. Length of the 

 body 2 lines ; of the wings 4 lines. 



a. Sierra Leone. Presented by the Rev. D. F. Morgan. 



Culex inexorabilis, n. s., fem. Nigro-fuscus, argenteo micans, an- 

 tennis pedibusque nigris, tarsorum articulis albo cinctis, alis 

 subfuscis. 



Body dark brown, adorned with silvery lustre, which especially 

 prevails beneath and on the sides of the body : mouth and feelers 

 black : abdomen wanting : legs black ; each joint of the feet with a 

 white band at the base : wings slightly brown ; veins dark brown ; 



