AQUATIC INSECTS IX NEW YORK STATE 279 



Eastern Long Island species 



COLLECTED AUG. IS, 1900 



lestes disjimcta. Bridgeliampton 



Enallagma doubledayi. Bridgeliampton 



Enallagma aspersum. Bridgeliampton 



Enallagma durum. Near Mecox bay (abundant ; in cop.) 



Enallagma civile. Near Mecox bay (abundant; in cop.) 



Ischnura verticalis. Near Mecox bay and Bridgeliampton 



Anax Junius. Near Mecox bay and Bridgeliampton 



Plathemis lydia (trimaculata) . Bridgehampton 



Libellula pulchella. Bridgehampton 



Tramea Carolina. Bridgehampton 



Mesothemis simplicicollis. Bridgehampton 



Near Mecox bay, where I found the two species of Enallagma 

 above recorded were many individuals of the spider, E p e i r a 

 s t e 1 1 a t a Hentz, whose orblike webs, 4 to 6 inches in diam- 

 eter, were stretched between the stalks of sedges and of 

 grasses. Within a distance of not more than yL mile along the 

 pond's edge, I found six individuals of Enallagma in the spiders' 

 webs. The dragon flies were all fully colored, were more or less 

 enshrouded in silk, and some of them were partly eaten. In 

 one and the same web were two Enallagmas. 



Part Jf 

 SOME NEW LIFE HISTORIES OF DIPTERA 



BY JAMES G. NEEDHAM 



During the second season of our station the work done on 

 Diptera was chiefly done on the families Chironomidae, 

 Gulicidae, Simuliidae, and Blepharoceridae, and is reported 

 on by Mr Johannsen in part 6. But, in the course of routine 

 operations, a few other very interesting new forms were come 

 on, and four of these will be described in the following pages. 

 Two of these, Tip u la flavicans and E p i p h r a g m a 

 fascipennis, were bred, and two were found only in the 

 larval stage. These larvae, however, are so unique and inter- 

 esting as to warrant their description at once; one clearly 



