NO. 2107. DRAG0NFLIE8, WASHINGTON AND OREGON— KENNEDY. 291 



obscure keel. Lateral lobe extends laterad, dorsad, and slightly 

 caudad, broad but terminates abruptly in a blunt })oint. Very little 

 pile. 



Male, live color. — Labium, labrum, clypeus, nasus and frons light 

 blue. Vertex darker blue with traces of violet. Eyes dark blue 

 above with lighter blue below. Color pattern of top joi head same as 

 in emma, but with aU the lines heavier (fig. 62), in some of the specimens 

 coalescing into a soHd spot, as is shown in figures 31, 63, and 64. 

 White hairs on labrum, frons and occipital region. Antennae black. 



Prothorax blue above, lighter blue on the sides and with the coxae 

 and ventral surfaces very light A line along the base of the anterior 

 lobe connecting at each end with the line along the upper sides, which 

 lateral fines connect posteriorly with the black fine along the base of 

 the posterior lobe. Two broad dorsal lines connecting the anterior 

 and posterior lobes, and extending caudad across the posterior lobe. 

 These lines are separated by a hair fine of blue. Trochanters with an 

 outer black spot. (All markings are black unless otherwise stated.) 

 Femora blue with an anterior and an exterior stripe separated by a 

 high pale keel. Tibiae blue with an anterior stripe from which arises 

 the anterior row of spines. Tarsi black. 



Mesothorax and metathorax blue, darker dorsally and anteriorly, 

 bluish gray ventrally. A very wide middorsal black stripe, one-third 

 wider than either pale area bordering it. Mesinfraepisternum with its 

 dorsal half black. Humeral suture heavily marked as foUows: 

 Lower or anterior half broad, upper or posterior half narrow except 

 an abrupt enlargement at upper end. In occasional specimens the 

 humeral stripe is broad and of uniform width. First lateral suture 

 not marked. Second lateral suture narrowly marked, but with an 

 abrupt, round enlargement at its upper end. Coxae and femora bluish 

 gray, tibiae blue, tarsi black. Markings of middle legs similar to those 

 in the fore legs but not as heavy and yet fighter in the hind legs. 

 Wings hyafine, neither bluish nor flavescent. Stigma dark brown. 



Abdomen with segments 1-7 intense blue above with sternum of 

 segment 1 brown and sterna of segments 2-7 black. Segments 8-10 

 fighter blue with brown sterna. Markings as follows (see figs. 31 and 

 32): 



Segment 1 with minute lateral black spot on its posterior edge. 



Segment 2 with a narrow band around its posterior end. On 

 either side above, a narrow stripe almost the length of the segment, with 

 the posterior end turning dorsad. 



Segments 3, 4, and 5 marked as follows: A broad band around the 

 posterior end of the segment. A small spot above on either side of 

 the anterior end of the segment. 



Segment 6 similarly marked, but with either anterior spot con- 

 nected with the posterior band by a fine running caudad. (In some 



