154 Journal New York Entomological Society. t Vo1 - xxvu. 



Wing of Gonomyia (Leiponeura) gladiator new species. 

 Wing of Gnophomyia olssoni new species. 

 Wing of Gnophomyia lachrymosa new species. 

 Wing of Gnophomyia laticincta new species. 

 Wing of Trentepohlia (Paramongoma) sororcula new species. 

 Wing of Tanypremna fuscitarsis new species. 

 Sc = subcosta ; R = radius ; M = media ; Cu = cubitus. 



OBSERVATIONS ON THE EGG-LAYING OF THE 



CADDICE-FLY BRACHYCENTRUS NIGRISOMA 



BANKS, AND ON THE HABITS OF THE 



YOUNG LARViE. 1 



By Helen E. Murphy, 

 Ithaca, N. Y. 



In the upland bogs near McLean, New York, there is a tributary 

 of Beaver Creek that flows over a sediment-covered bed well shaded 

 by trees, dashes into the open, over rocks and boulders for about fifty 

 rods, then again disappears into the woods. In this restricted open 

 area the square built cases of the larva of the caddis-fly are found 

 attached to the upper surfaces of the stones in mid stream. Mr. J. 

 T. Lloyd studied them here, and published a preliminary account of 

 the habits of this species, with a partial life-history in 1915. 2 It is 

 the purpose of this paper to record some further observations, espe- 

 cially upon oviposition and the habits of the young larvae. 



During the latter part of May, generally on the late afternoon of a 

 clear day, females come out from hiding in crevices of the bark of 

 the trees. Swiftly and warily they fly along the bank, just above the 

 surface of the water. Then one will enter the water, and while 



1 Of the European species, Herr Georg Ulmer in " Die Siisswasser Fauna 

 Deutschlands ; Trichoptera," describes the immature stages of B. subnubilis 

 and records that it inhabits sluggish waters, rich in plants. The larvae build 

 square cases at first, but older cases are often found with the corners rounded. 

 The pupal cases are cylindrical. B. montanus inhabits rocky streams. The 

 cases are regularly four-sided, made of small slender pieces of sticks, leaves, 

 and bark. The pupal cases are the same kind. 



2 Pomona, Jour, of Ent., 7: 81-86, plate. 



