NO. 2192. DRAG0NFLIE8, CALIFORNIA AND NEVADA— KENNEDY. 577 



The following are live color notes of Octogomphus: 



Male. — Labriun black, its lateral edges yellow. Face greenish 

 yellow, with the labrum edged with black above and below, and a 

 triangular spot on its median line; nasus black, in some specimens 

 pale but surromided by black. Vertex and occiput black, except 

 triangle of greenish yellow posterior to the ocelli. Rear of head 

 black. Eyes gray. (See figs. 336-340.) 



Prothorax with anterior lobe yellow and a broad middorsal stripe 

 yellow, otherwise black. Mesothorax and metathorax greenish yel- 

 low with a very broad black antehumeral stripe which, in some speci- 

 mens, extends caudad shghtly beyond the humeral suture. In some 

 individuals the humeral stripe is divided by a vertical yellow line, a 

 remnant of which always remains as a small, round, yeUow spot in 

 the upper end of the black stripe (see figs. 335 and 340-341). Antea- 

 lar and lateral alar ridges black. Second lateral suture narrowly 

 black, and side of thorax edged with black below. Both infraepis- 

 terna greenish, bordered with black above'. Coxae greenish, heavily 

 marked with black. Legs black. Pterostigmas black. 



Abdomen black, with a broad greenish-yellow middorsal stripe on 

 segments 1 and 2, which is attenuated caudad in a fine hair fine on 

 segments 3 to 6. Side of segment 1 greenish, in the center of which is 

 a small black spot. Auricle on segment 2 greenish yellow, which 

 color also forms a wide stripe along the posterior and ventral edges 

 of its side. Segment 3 with an anterolateral spot and its lower 

 edge yellow. The intersegmental membrane of segments 7-10 

 yellow. Segment 9, black, except a minute middorsal spot and yel- 

 low mottlmg on its side, which is usually confined to an anterior 

 and a posterior spot, but in some specimens a bar joining these. 

 The figures 336-339 show the variation in this mottMng. Perhaps 

 extensive series might show local races with regard to these mottlings, 

 as the Stevens Creek specimens have the least yellow on segment 9 

 and the Napa series shows several with the spots large and confluent. 

 Segment 10 black, with a large oval middorsal spot, which in most 

 specimens is followed by a minute spot. Appendages black, except 

 the dorsal surface of the superiors, which is yellow. 



Female. — Color similar to that of the male. Each of the two at 

 hand has a small yeUow spot in the dorsal end of the humeral stripe. 

 Dorsal abdominal stripe as in the male. The side of the abdomen 

 with two yellow stripes, one of which is a hair line along the lower 

 edge of the pleura, while the other is a midlateral stripe on segments 

 1 and 2, but on segments 3-7 breaks up into a series of small yellow 

 dots, of wliich there are two to four on each segment. Segments 8 

 and 9 with yellow mottling on the side. Segment 10 black, except 

 a round middorsal spot. The superior appendages and the cerci 

 yellow. (See figs. 335 and 341.) 



65008°— Proc.N.M.vol.52— 17 37 



