272 Illinois State Laboratory of Natural History. 



Cosmocoma maculipes Ashm. 



Female taken in a similar way Sept. 14, in collecting 

 along shore of Quiver Lake. 

 Phanums tahanivorus Ashm., n. s. [Fig. 55, 56.] 



Bred from eggs of Tabanus atratus Aug. 4 and Sept. 

 13. Tlie species is described and discussed by Mr. Ash- 

 mead on page 274, and the biological details are given 

 under Tabarms atratus. 



Family POMPILID^. 



The low shores about the head of Quiver Lake wer^ 

 frequented by many species of this family, probably in 

 search of the spiders which are so abundant on these 

 wet shores. P. Uguttatus was taken May 20 and P. 

 philadelphieus Aug. 30, together with three other well- 

 marked species which seem to be new to our collection, 

 although it already" contains more than seventy-five 

 Illinois species of this family. They are perhaps cor- 

 related with the peculiar character of the surrounding 

 region. 



Pmnjpilus^ n. s. (?) 



A cluster of hymenopterous cocoons was found in 

 August on the springy shore of Station B, under an 

 old log. They were placed in a breeding-cage, in which 

 the first imago appeared Sept. 1, the last of the lot 

 coming out on the 8th of this month. The species is ap 

 parently new% but those bred were all females, and it 

 seems hardly desirable under the circumstances to offer 

 an isolated description in the present connection. 



The cocoon is Isabella color (reddish- argillaceous), elon- 

 gate-elliptical, 12-13 mm. long, and 5 mm. in diameter 

 at the anterior third, opening near this end by a clean 

 circular cut for the escape of the imago, the end sepa- 

 rating as a hemispherical cap. At the other end is a 

 darker knob, marked off by a slight constriction. The 

 walls are dense, but thin and papery, shining within, 



