46 PACKARD, 



is an oblong light-brown spot, and an irregular lanceolate 

 oval spot on each side of the posterior half of the abdo- 

 men extending to a point opposite the insertion of the 

 wing. On the under side of the mesothorax is a broad, 

 flattened corneous area, the forelegs being widely sepa- 

 rated from the two posterior pairs. The sides of the 

 thorax are pale with a few dusky spots. The legs are long 

 and very slender, the middle and hind tibiae and tarsi 

 dusky. The wings are white, reaching when folded to 

 the end of the third segment from the end of the body. 

 The abdomen is dusky-brown, paler at the tip, with a 

 dusky spot on each side of the two last segments ; on the 

 under side is a faint greenish tinge. The tip is flattened, 

 the anal forceps are large with the tip bent in, forming 

 a V ; and meeting on the median line of the body. 



Compared with what is apparently a true Chironomus 

 from Labrador, and other species living in Massachusetts, 

 the thorax of the present species is longer, and less glob- 

 ular, the mesosternum presents a longer area, and the 

 antennse are longer and slenderer. The wings are un- 

 spotted ; there is no transverse costal veinlet at the base 

 of the wing ; the costal vein terminates beyond the middle 

 of the wing, and the first subcostal veinlet terminates on 

 the outer third of the wing, difiering in these characters 

 from the more typical Chironomi. The abdominal hairs 

 are also shorter. 



The female (Fig. 4, head), has short, seven-jointed 

 antennae, of which the terminal joint is nearly twice as 

 long as the one next to it ; they are slightly hairy. The 

 female of our species difiers from the other true Chironomi 

 in the shorter and stouter antennae and shorter and smaller 

 palpi. The eyes are much as usual, as is the size of the 

 head in proportion to the thorax. Our ? specimen was 

 too incomplete for further description. 



Ephydra halophila, n. sp. 



The next saline insect we describe comes from the 

 Equality Salt Works, of Gallatin county, Illinois. Spec- 

 imens were forwarded to the Institute by Mr. E. T. Cox, 

 with the followino' notes on their occurrence : — 



