NO. 2192. DRAGONFUES, CALIFORNIA AND NEVADA— KENNEDY. 565 



Abdomen black, except a broad middorsal band on segments 1 and 

 2; lower side of 1 green, which is confluent with a large green spot on 

 side of 2 (in some specimens a second and minute spot posterior to 

 auricle). Lateral keel of segments 1-3 yellow. Segments 3-7 each 

 with a narrow middorsal triangular yellow spot extending full length 

 of segments 3 and 4, and successively shorter to the eighth on which 

 it occupies only the anterior fourth. Large anterolateral spot on seg- 

 ment 3, the anterolateral spots on 4-7 being reduced to mere points. 

 Basal articulatory membranes of segments 8-10 yellow, all others 

 black. A large yellow spot, three-fifths the length of the segment, 

 occupying the lower anterior angle of segment 8. A similar but larger 

 spot occupying the anterior two-thirds of segment 9 and extending 

 caudad along the keel but not reaching the posterior end of the seg- 

 ment as in sobrinus. Segment 10 and appendages black. 



Female. — Color similar to that of male except on abdomen, which is 

 colored as follows (fig. 289) : Black with more extensive yellow pattern 

 than in the male. Segment 1 black, with large dorsal spot and sides 

 yellow. Segment 2 black, with large oval dorsal spot full length of seg- 

 ment and broad lateral stripe with a second narrow stripe along lower 

 edge yellow. Segments 3-7 each with a narrow triangular middorsal 

 spot extending full length of segment; each with lateral keel narrowly 

 yellow. Segment 3 with an irregular lateral stripe. Segment 4 with 

 an anterior lateral spot followed by a second and smaller spot. Seg- 

 ments 5-7 each with an anterior lateral spot larger than those in the 

 male. Segment 8 with short triangular middorsal spot on anterior 

 end of segment, and a large lateral spot extending along three-fourths 

 of the length of lateral keel and dorsad half the height of the segment. 

 Segments 9 and 10 black, except a large lateral yellow spot on 9 ex- 

 tending along the entire length of the lateral keel and at its anterior 

 end dorsad half the height of the segment. The three round terminal 

 lobes of segment 10 yellow. Articulatory membranes of segments 

 8-10 yellow. 



The variations of the cells between A and Aj, on being checked 

 against figure 313, show 8 = A, 10 = B, 11 =C, 15 = D, 10 = F. 



Donneri is very close to confraternus, appearing to differ only in 

 coloration. Confraternus, which I have not seen, has blunt superiors 

 but has a double humeral stripe. Donneri and confraternus both are 

 smaller than sohrinus and both have little or no color on the dorsum 

 of segment 9. 



In the collection of Cornell University are three males and one 

 female from Seattle, Washington, collected by R. Osburn,^ which 

 are labeled confraternus. These agree with my sohrinus specimens 

 from California in detail, having the larger size of sohrinus, the double 

 humeral stripe, the large spot on the dorsum of segment 9, the 

 lateral spot on 9 reaching to the lateral inferior angle of the seg- 



1 Osbum, R., Ent. News, vol. 16, 1905, p. 189. 



