LIST OF DIPTERA. 363 



eyelets : lip black ; its tip clothed with short tawny hairs : feelers 



black, not longer than the head ; first and second joints short, 



of equal length, clothed with short tawny hairs ; third joint red, 



linear, piceous at the tip, full twice the length of the first and of 



the second ; fourth joint spine-shaped, dark red, slender, black 



at the tip, about one-third of the length of the third : eyes red, 



divided into two regions ; the inner part small, flat, composed 



of rather large facets, which however successively decrease in 



size as they diverge to the outer part which is convex, composed 



of small facets, and much larger than the inner part, which it 



half encircles : chest and breast finely punctured, thinly covered 



with short white hairs ; the former having also a few long tawny 



hairs on its hinder part : abdomen thin, increasing in breadth 



from the base to the tip, full twice the length of the chest ; 



segments from the first to the sixth very slightly convex, smooth, 



i shining, clothed with very short tawny hairs ; first and second seg- 



; ments very short; third and following segments to the sixth long ; 



I seventh and eighth dull, flat, large, very finely punctured, with no 



1 hairs ; seventh slightly red along the hind border and on the side 



1 borders, having on each side five large punctures disposed by twos 



and threes in two oblique rows ; in the eighth segment the red 



overspreads more of the surface, and it has on each side three more 



I indistinct punctures which are arranged in a more oblique row ; un- 



j derside of abdomen dull, punctured ; segments with a rim on each 



| side : the last segment red on the hind border, and more slightly so 



I on each side border : legs red, clothed with short tawny hairs ; hips 



i black ; shanks beset with some longer tawny hairs ; feet piceous, 



and armed with bristles ; hind shanks slightly curved and club- 



i shaped ; hind feet rather broad : wings narrow, slightly gray ; each 



j with two large brown spots, one is on the middle of the fore border, 



1 the other at the tip of the wing, and they descend into the disk 



I along the borders of the cross-veins ; the hind border about the tip 



1 is brownish gray, with a colourless streak on each areolet ; wing- 



| ribs and veins black ; poisers tawny. Length of the body 4^ lines ; 



of the wings 9 lines. 



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



Dasypogon Prytanis, n. s. Canus, thorace vittis tribus fuscis, antennis 

 nigris^ pedibus fulvis, femoribus basi, tibiis apice tarsisque ni- 

 gris, femoribus posticis crassis dentibusque armatis, tibiis posti- 

 cis subarcuatis, alis albis. 



Body stout : head hoary, with short hoary hairs on the crown, 

 and having a few tawny bristles in front, rather thickly clothed be- 

 neath with white hairs, very short, much broader than the chest ; 



PART II. 2 K 



