NO. 2107. DRAG0NFL1E8, WASHINOTON AND OREGON— KENNEDY. 348 



Figure 198 gives the dorsal view of the largest of these Gomphus 

 nyiiiphs and figures 199, 200, aud 201 show details of structure of 

 the same specimen. 



19. ANAX JUNIUS (Drury). 



Nigger Pond is the only place at which I saw this species. Here 

 it emerged during July in great numbers, judging from the numerous 

 exuviae clinging to the outer cattails, but during the many days spent 

 in collecting on the pond I saw only an occasional Anax. I beheve 

 that the yellow-headed blackbirds {Xantliocephalus xantliocephalus) 

 which nested in the cattails ate most of the tenerals, as a single Anax 

 reared by me emerged early in the morning when the blackbirds 

 would be after such conspicuous morsels. I examined several black- 

 bird stomachs with the following results: 



CONTENTS OP STOMACHS OP SEVEN BLACKBIRDS. 



(1) Stomach of male yellowhead: 13 teneral damselflies, 2 grains of 

 wheat, and a mass of cliitinous teneral remains. 



(2) Stomach of male yellowhead: 8 wheat grains and a mass of 

 teneral remains. 



(3) Stomach of male yellowhead: 8 rye grains, 100 grass seeds 

 {Panicuin%) , 2 teneral Zygoptera, 1 wasp, and a mass of teneral 

 remains. 



(4) Stomach of female yellowhead: 2 beetles and a mass of teneral 

 remains. 



(5) Stomach of male red-winged blackbird: 1 beetle, 4 teneral 

 damselflies, and a mass of teneral remains. 



(6) Stomach of male redwing: A mass of wheat skins and 1 beetle, 

 but no teneral remains. 



(7) Stomach of female redwing: 1 beetle, 5 wasps, 4 caterpillars, 

 but no teneral damselflies. This bird carried in its bill 1 moth, 1 fly, 

 and 2 green caterpillars 



Anax differs in time of emergence from the two species of Aeshna 

 (californica and multicolor) wliich swarm about this pond. The 

 Aeshnas emerge between 8 and 12 o'clock in the evening, consequently 

 by daylight their wings are hardened and they are safe from black- 

 birds. So far as numbers of exuviae are concerned, Atuix emei^es in as 

 great abundance as either Aeshna, but the adults of Anax are rare 

 whereas adults of the species of Aeshna are abundant. 



20. AESHNA CALIFORNICA Calvert. 



This species appears some years as early as April 1 . It is in its season 

 during May and June and is seldom found during July or later. It 

 swarms about those alkaline ponds in which there are few fish, but I 

 have also taken it on the cold torrents (Logic and Dry Creeks) on the 

 Yakima Reservation. 



