121 



3. In plate I are figured the male abdominal appendages, lateral and dorsal 

 views, of four species of Enallagmas. Two of these, calverti and aspersum, have 

 been taken in the State, and the occurrence here of cyathigerum and doubledayi is 

 probable. The species here designated as cyathigerum is the same as annexum. I 

 believe that annexum (North American) and cyathigerum (European) are identical. 

 Hageni and cyathigerum are very closely related — much more closely than calverti 

 and cyathigerum. Doubledayi finds its closest allies in carunculatum and civile 



4. In the report of the State Geologist for 18t^7, p. 404, I have recorded 

 Enallagrna laterale Morse for Shriner Lake. This is a mistake in determination; 

 the single male is carunculatum. 



5. The seasonal range of Enallagma traviatum is possibly not so short. I 

 have records of it at Winona Lake from June 24 to July 13, 1901. It is much 

 less conspicuous than any other Enallagma with which I am acquainted. 



6. On and about July 6, 1901, Mr. Kennedy and myself noticed on several 

 occasions the increased activity of Enallagma polltttum and signatum as twilight 

 came on. In the spatter-dock beds, where, during the mid-day hours only an 

 occasional wandering male would be seen, just before sundown many pairs clung 

 to the broad leaves or flitted in couple far out over the lake. 



7. On August 25, 190), at Cedar Lake, Whitley County, Mr. Kennedy and 

 myself took, in two or three hours' time, 65 specimens of Ischnura kellicotti about 

 water-lily beds at the southwestern end of the lake. 



8. The distribution of Herpetogomphus designatus as now known is such that 

 this species may be looked for in southwestern Indiana. In the key to genera, 

 Dragonflies of Indiana, it will runout to Ophiogomphus. Professor Needham has 

 pointed out that the two genera, Ophiogomphus and Herpetogomphus, may be dis- 

 tinguished by the form of the post anal cells. This character is indicated in figs. 

 2 and 3, pi. I. In the case of Ophiogomphus the two branches of the anal vein 

 form a distinct loop. Ophiogomphus rupinsulensis was taken, June 23 and 30, 1901, 

 along the Tippecanoe River, near Warsaw. 



9. Dromogomphus spinosus has been observed during 1901, as follows: Tippe- 

 canoe River, June 23 and 30; Chapman Lake, June 30; and Ft. Wayne, along 

 the old canal feeder, July 18. During July the species was taken several times 

 at Winona Lake. 



10. Lanthus albistylus Selys has been taken in Maine', Pennsylvania and 

 Tennessee; and its occurrence in Indiana is very probable. In the Dragovjlies 

 of Indiana this species will run out to the genus Gomphus. Lanlhus and Gomphus 

 may be separated by the form of the post-anal cells (see figs. 4, 5, 6 and 7, pi. I). 

 In Lanthus the portion of the seond branch of the anal vein bounding the 



