NO. 2107. DRAGONFLTES, WASHn^GTON AND OREGON— KENNEDY. 293 



Mesothorax and metathorax blue, more intense on the anterior 

 surfaces, shading into violet gray on sides and under surfaces. Coxae 

 and femora violet gray; tibiae greenish blue. Legs and thorax 

 marked as in the male. Stigmas pale brown. Wings hyaUne with 

 a suggestion of flavescence; stigma brown. 



Abdomen, ground color blue, an intense blue on dorsal surface 

 shading into a more violet blue on the sides of segments 1-7. Ster- 

 num of segment 1 brown and of 2-7 black. Dorsal and lateral sur- 

 faces of segments 8, 9, and 10 pale blue. Markings as follows (see 

 figs. 33 and 34) : 



Segment 1, on either side a minute spot at the posterior end. 



Segment 2 with a narrow black band around posterior end. At 

 anterior end a small spot above on either side. At posterior end a 

 larger spot, triangular (sometimes quadrangular or even elliptic) 

 above on either side. 



Segment 3, a narrow band around the posterior end. At the 

 anterior end above on either side, a small spot attenuate caudad. 

 At the posterior end a larger spot on either side, but with the inner 

 anterior angles coalesced across the middorsal lino, and the posterior 

 ends touching the posterior band. (These large paired posterior 

 spots are homologous with the U -spots on the abdomen of the em/ma 

 females.) In each lower posterior angle of the pleurite an obhque 

 stripe running dorsad and cephalad for one-fifth the length of the 

 segment. 



Segments 4 and 5 marked like segment 3, but with the markings 

 successively heavier until in segment 5 the two posterior dorsal spots 

 are coalesced into a heart-shaped mark \vith the apex pointing 

 caudad. 



Segment 6 marked like segment 5, but with the two antero-dorsal 

 spots attenuate caudad until their posterior ends coalesce %vith the 

 anterior points of the heart-shaped postero-dorsal marking. 



Segment 7 with marldngs similar to the preceding, but with the four 

 dorsal spots enlarged and coalesced into a large V-marking, which 

 when viewed from above resembles an old fashioned clothespin with 

 the head pointing caudad. 



Segment 8 with a minute spot in the lower posterior angle of the 

 pleurite. 



Segments 9 and 10 without markings. 



As stated previously, the teneral ground color is a chalkj" white. 

 The first change is to a brownish %nolet along the dorsal surface of 

 the abdomen. Then the eyes become grayish violet and segments 

 8, 9, and 10 become pale blue. The chalky gray of the entire body 

 then takes on a pale brownish tint with suggestions of violet on the 

 abdomen and femora. The majority of the females collected were 



