170 



272. Ormosia bilineata Dietz. 



Whately Glen, Franklin Co., May 22, 1925; Orient Springs, 

 Hampshire Co., June 3, 1925. 



273. Adelphomyia pleuralis Dietz (Trans. Amer. Ent. Soc, 47: 



251-252, 1921). 

 Orient Springs, Hampshire Co., July 9-24, 1925; Mt. Toby, 

 Franklin Co., altitude 700 feet, July 28, 1925. 



274. Limnophila albipes Leond. (Ent. News, 24: 248-249, fig., 



1913). 

 Orient Springs, Hampshire Co., July 24, 1925. 



275. L. laricicola Alex. 



Lake May, Berkshire Co., June 12, 1925; in sphagnum bog. 

 This very rare fly was hitherto known only from the badly dam- 

 aged type male, taken in the southern Adirondacks of New York 

 under exactly similar conditions. 



276. Nephrotoma brevioricornis (Doane). 

 Lake May, Berkshire Co., June 23, 1925. 



277. Tipula aprilina Alex. 



Dwight, Hampshire Co., May 31, 1925; in open swamp. 



As representative of the June fauna of the Berkshires, the condi- 

 tions obtaining at Lake May are here described: 



Lake May (Goose Pond), Berkshire Co., Massachusetts. 



The writer and Mrs. Alexander spent the three weeks between 

 June 11 and July 2, 1925, at Lake May in the Berkshires, not far 

 from East Lee. The Tipulid fauna was found to be richly devel- 

 oped and several additions to the Massachusetts list were secured. 

 In the accompanying list, the various specimens were taken in 

 the woods in the vicinity of the lake except where more specific 

 localities are described. The altitude of Lake May is 1500 feet 

 and the material was secured at this approximate altitude. Two 

 localities, discussed in the text as " Bog" and " Stream" should be 

 explained in greater detail. 



Stream. — A small stream that arises in cold springs north of the 

 lake offers exceptionally fine collecting where it traverses the Bas- 

 sett property, about one-half mile from the lake. Here the 

 stream forms a series of small cascades and rapids over densely 

 moss-covered rocks, moderately shaded by hemlock, yellow and 

 white birch, butternut and willow. At this season of the year the 

 herbage is chiefly of interrupted and sensitive ferns, seedling 

 Impatiens and scattered remnants of the spring flora, as Tiarella, 

 Smilacina and others. The crane-flies were mostly swept from 

 this rank herbage. 



Bog.— Near the headwaters of the above stream, on the higher 

 northwest banks of the lake is a small boggy area that is fed by 

 cold springs. There is much sphagnum with some sun-dew but 

 no larch or pitcher-plants. Scattered hummocks of dry earth 

 support a dense growth of hemlock, red maple, etc., with dense 

 clusters of mountain laurel that is in full flower at this season. 



