123 



the mid-dorsal carina, which is very feebly green. Abdomen black, a dor.-al band 

 and sides of first two or three segments yellowish; a yellow spot at base of each 

 of segments, four to seven; and sides of 8 and 9, usually yellowish. * » * 

 This is Gomphus sp. Williamson, Dragon flies of Indiana, p. 294." This species 

 is most closely related to abbreviatus, which species, however, is not known west of 

 the mountains. From breids, another close relative, which has been taken in 

 western Pennsylvania, it may be separated at sight by the green face, the face in 

 brevis being sharply marked with black. 



12. Gomphus descriplus Banks should be dropped from the Indiana hypo- 

 thetical list. It was recorded from Illinois on an erroneous determination. The 

 species has not been recorded west of the mountains. 



13. Mr. Tough, in a recent letter kindly calls my attention to an error in the 

 description of Gomphus dilatatus, p. 286, Dragonflies of Indiana. Second line from 

 bottom, for apical read basal. Mr. Tough reports taking two males of this species 

 in Illinois, and one of these has a s^all but distinct yellow basal spot on the 

 eighth abdominal segment. . The few specimens I have seen of dilatatus have had 

 eight immaculate above. 



14. Gomphus segregans Needham is a synonym of Gomphus spiniceps Walsh. 

 15 On June 17, 1901, at a ripple near the Clover Leaf railroad bridge over 



the Wabash Eiver at Bluffton, I took Gomphus fraternus, G. crassus, and Pro- 

 gomphus obscurus. P. obscurus was the most abundant and G. crassus the rarest. 

 The next day at the same ripple, at the same time of day, under conditions which 

 to me seemed the same as the day before, I took G. graslindlus, G. crassus and P. 

 obscurus. But G. fraternus was not seen, and O. graslinellus, not seen on the 17th, 

 was the commonest species of the three on the 18th. Specimens of the four species 

 were all bright and clean, not at all worn. The why, whence and whither of 

 imago Gomphi is a puzzle. On both these dates in the crowded willow herbs at 

 the ripple Argia putrida, apicalis, tibialis, sedula and violacea — the five Argils known 

 for the State — were pairing. 



16. During the season of 1901 Progomphus obscurus was observed at Bluffton, 

 June 17 and 18 ; Tippecanoe River, near Warsaw, June 23 and 30; Chapman 

 Lake, June 30, where half a dozen exuviae were gathered on the sand beaches 

 near the water's edge; old canal feeder and St. Joseph Eiver near Ft. Wayne, 

 July 19. 



17. An exuvia of Hagenius brevistylus was collected from a pile in Tippecanoa 

 River, June 23, 1901. On June 30 Mr. Kennedy took an imago along the river, 

 and on the same date several were seen in a second growth brush lot, flying 

 leisurely about— if no insect collector was in striking distance — and frequently 

 alighting on twigs, stumps or an old rail fence. 



