700 PROCEEDIXf.'S OF THE NATIONAL MUSEUM. vol. xxvii. 



Leng-th, 17 mm. ; abdomen, S mm. ; hind femur, 5 mm. ; width of 

 head, 5 mm.; of abdomen, 0.5 mm. 



Body smooth, depressed, greenish, varied with brown above. Head 

 depressed, sloping forward to the l)ase of the antennse, strongly nar- 

 rowed behind the e^^es to the nearly straight hind margin. Labium 

 large, its hinge reaching posteriorly as far as the middle of the meso- 

 thorax; median lobe of the mentum prominent, with a fringe of slender 

 scattered spines; mental setffi 9-10, the 5-6 outermost longer than the 

 others. Lateral seta? 10. Hook slender, setiform; teeth almost obso- 

 lete, with the usual spinules. 



Legs long and thin. Wings reaching backward as far as the middle 

 of the seventh abdominal segment. 



Abdomen l)road, depressed, with thin lateral margins. Dorsal hooks 

 on segments 3-9 in a regular and even series, thin. Hat, sharp-pointed, 

 that of the ninth segment bent downward at tip. Lateral spines on 

 segments 8 and 9, thin, flat, sharp, strongly convergent on 9, and with 

 spinulose-serrate external margins. Ninth segment strongly concave 

 on dorsal apical margin; tenth annular included. Appendages slightly 

 longer than segment 9 is on the dorsal side, short-triangular, sharp- 

 pointed, hairy on margins, the laterals a little 

 more than half the length of the others. 



DYTHEMIS FUGAX Hagen? 



1 have described" a nymph from Roswell, New 

 Mexico, which I have supposed belongs to this 

 species. It is very like the nymph described 



Fig. 2.— End of .abdomen above. and referred to IJ. vel<j,i\ except in the 



OF NYMPH OF DVTHEMIS p i> j^l 1 j. 1 • j.1 • 1 j.! 1 • j. I 



FUGAX? FROM ABOVE. tomi ot thc lateral spuies on the eighth and nmth 



abdominal segments. Fig. 2 is a drawing of the 

 end of the abdomen of this species. A comparison of this figure 

 with the photograph reproduced in Plate XLH, lig. 2, will serve to 

 show the differences. I have deposited a specimen of this species in 

 the United States National Museum. 



RHYOTHEMIS PHYLLIS Sulzer? 

 mate XLI, tig.s. 1, 2. 



Three nymphs apparently well grown. 



Length, 19 mm.; of abdomen, 12.5 nmi. ; hind femur, ♦! mm.; width 

 of head, 5 mm. ; of abdomen, 7 nun. 



A short and ver}" smooth species, with broad depressed abdomen. 

 Head pentagonal, with straight or slightly concave hind margin, 

 obtuse hind angles, small eyes covering the lateral angles of the head 

 at midway its length, and with obtusely prominent labrum. Antennae 

 pale, 7-jointed, joints nearly equal in length excepting the third, which 



"Psyche, 1903, p. 139. 



