72 



account of their unusual occurrence in collections that have been 

 studied. 



Not much was observed regarding the habits of Stobaera 

 minuta and Prokelesia setigera, but both were taken from 

 grasses by sweeping and the former was common enough to 

 indicate that it must be of some injury in pastures. Both 

 species were described in Volume V. of the Ohio Naturalist for 

 the first time, and Prokelesia was offered as a name for a new 

 genus. 



Tinobregmus vittatus was taken from a common plant, Iva 

 fi-utescens, which appears to be confined to the salt marshes 

 where it grows in abundance and an interesting lot of species 

 of different orders feed upon it. The insect was named by Van 

 Duzee in 1894, from female specimens taken in Florida. His 

 description was published in the Bulletin of the Buffalo Society 

 Of Natural History. In 1903 Professor Osborn described the 

 male in the Ohio Naturalist. In the plate the male, female and 

 Icrva are figured. The three are so different in general appear- 

 ance that they are not easily associated at first, but on closer 

 examination are seen to have an anatomical agreement which 

 clearly fixes their identity. 



In the larva the abdomen is flexed upward at nearly right 

 angles to the rest of the body and the longitudinal ridges on the 

 front are much more pronounced than in the adult. A pecu- 

 liarity of the species is the very small scutellum. This is smaller 

 ill the male than in the female, but slightly larger in the larva 

 than in the adult of either sex. 



ODONATA. 



The species preceded by an asterisk (*) were determined 

 by E. B. Williamson of Bluffton, Indiana; the others were de- 

 termined by myself. 



*Lestes unguiculatus Hagen. 



*Ischnura prognata Hagen. 



*Enalla2:ma signatum Hagen. 



*Coryphaeschna ingens Kambur. 



Epiaeschna heros Babr. 



Pantala hymenaea Say. 



