REPORT OF THE STATE ENTOMOLOGIST I907 I7I 



sented by five specimens taken in August, one L i m n o b i a 

 p a r i e t i n a taken on the 15th of August, and one H e 1 o b i a 

 p u n c t i p e n n i s taken on the 20th of July. 



The black flies (Simuliidae) were doubtless much less abundant 

 than they would haye been if our tent had been set over the brink 

 of a waterfall — the favorite home of their larvae. But few 

 moth flies (Psychodidae) were taken, 10 specimens in all, and 

 these all in August. Mosquitos (Culicidae) likewise were few, 

 14 in all, distributed with considerable regularity over the entire 

 month. 



Midges (Chironomidae) appeared in surprising abundance and 

 variety. The full list of the species taken is given in Dr Johann- 

 sen's supplementary report, published herewith. The numbers of 

 individuals given in the table, although very large, are much smaller 

 than they would have been, but for depredations of some of the 

 larger flies (especially Hemerodromias) and spiders, which managed 

 to find their way in. The tent flaps were folded and then pinned as 

 closely as possible; but the small spiders, which came presumably 

 from the overhanging boughs of adjacent shrubbery, would get 

 in, one or two of them almost every day, and up in the angles of 

 the tent under the ridge cord, they obtained a maximum of food 

 with a minimum of effort. It was the more deUcate little pale 

 species that suffered most from these depredators. 



The Tabanidae taken in the tent were very few : i specimen of 

 Chrysops vittatus, and 10 (in August) of an undeter- 

 mined species of Tabanus. 



The Empididae were ah of two species : Hemerodromia 

 v a 1 i d a and H. scapularis. These made themsp^^^es very 

 much at home in the tent. They were to be seen constantly eating 

 the little yellow midges of the genus Orthocladius, or occasion- 

 ally a larger Tanypus or even a Chironomus as big as them- 

 selves. 



The remaining three families of Diptera were represented each 

 by single species : the Dolichopodidae by Dolichopusscopa- 

 r i u s ; the Scatophagidae by Cordylura capillata and 

 the Anthomyiidae by an undetermined species of Pegomyia. 



There can be no doubt that nearly all these forms listed lived 

 as larvae in the water or on the stones beneath the tent. There is 

 a possibility that a few of those most sparingly represented may 

 have found their way in as did the spiders, by working between 

 the flaps. I think it probable that some of the mosquitos followed 



