322 PROCEEDINGS OF THE NATIONAL MUSEUM. vol.49. 



Abdomen very similar to that of illinoiensis but differing in three 

 particulars: (1) The dorsal spines of segments 2 and 3 are straight, 

 whereas they are slightly hooked in illinoiensis (fig. 149, Tnagnijica; fig. 

 155, illinoiensis). (2) The lateral spines on segment 9 do not reach 

 the posterior margin of segment 10, whereas in illinoiensis they sur- 

 pass segment 10 (fig. 150, Tnagnijica; fig. 156, illinoiensis), (3) The 

 posterior edge of the sternum of segment 9 is fringed with hairs, 

 whereas in illinoiensis there are seldom more than two to four short 

 hairs to be fomid on this edge (fig. 150, Tnagnijica; fig. 156, illinoiensis)' 



General color of five nymphs dirty ohve, in detail as follows (see 

 figs. 146 and 147) : Antennae pale, no markings. Frontal horns dark. 

 Eyes and triangular areas between them, which represent the adult 

 eyes, dark. Parts of head posterior to eyes pale. Dorsal surfaces 

 of thorax and whig j^ads dark brown, which, excepting the eyes, are 

 the darkest areas of the nymph. Legs with three bands on the femur ; 

 tibiae dotted, with hind legs the darkest. Dorsal surface of abdomen 

 mottled and speckled with olive brown, with a more or less well 

 defuied spot on the outer end of each segment. All ventral surfaces 

 of the larva pale. 



In Needham's key to nymphs of Macromia,^ Tnagnijica would come 

 under division "a." Thus: 



a^. Lateral spines of abdomen directed posteriorly, hardly incurved. Pyramidal 

 frontal horn acute at apex. 



b^. Dorsal spines on abdominal segments 2 and 3 straight magnifica. 



b"^. Dorsal spines in abdominal segments 2 and 3 slightly hooked at tip. .illinoiensis. 



d'. Lateral spines of abdomen strongly incurved at tip. Pyramidal horn on front of 



head obtuse tacniolata. 



I have taken Tnagnijica in Cahfornia on Coyote Creek in Santa Clara 

 County, where it emerged early in May and was on the wing about 

 six weeks; also on Chico River, on a small creek near Oroville, June 

 12, and on the asylum grounds at Napa, June 8. Numerous exuviae 

 have been found at these places and none over 2 feet above the water, 



5. SOME LISTS OF ODONATA COLLECTED IN WASHINGTON AND 

 OREGON FROM 1909 TO 1913. 



The fifth part of this paper is devoted to lists of Odonata from 

 various locaUties in which I have collected in Washington and Ore- 

 gon. Various notes on habits of imagoes and descriptions of nym- 

 phal stages have been inserted in these lists as being the most logical 

 place for them. 



BAKER VALLEY, OREGON. 



During the summer of 1909 I collected in tho Baker Valley of 

 eastern Oregon. This valley lies at an elevation of 3,400 feet in 

 the Blue Mountains. The floor of the valley lies m the sagebi-ush, 



' Npodham, James 0., and Betten, Cornelius. Aqiiatif Insecls of the Adirondacks. Bull. 47, N. Y. 

 State Mus., pp. 612, September, 1901. See p. 483. 



