PLECOPTERA OF NORTH AMERICA 91 



The fusion between veins Rs and M in the hind wing ex- 

 tend one-third the length of the wing disc. 



Abdomen pale brownish, darker at the sides and to- 

 ward the tip. Tails (basal portion only preserved) yel- 

 lowish brown. 



Male. Unknown. 



Female. Subgenital plate broadly oval, evenly con- 

 toured, completely overlapping the ninth sternite. 



Distribution. — California. One female taken from the 

 stomach of a trout caught in Marblefork Giant Forest, 

 King's River Trail, Sequoia National Park, between 6,500 

 and 7,100 ft. altitude on July 24, 1907. Cornell Univer- 

 sity collection. Mounted on two slides (J. C. Bradley). 



Perla phalerata Smith. 



(Plate 17, figs. 9. 10.) 

 1917. Dictyogenus ? phaleratus Smith, Trans. Araer. Ent. Soc, 43:485. 



Length to wing tips, female, 21 mm. Expanse, 32 mm. 



Color yellowish, phalerate with black; a broad, black 

 triangle on frons, with apex to rear; a large black four- 

 rayed spot on top of head, U-shaped in front, the hollow of 

 the U surrounding the rear point of the frontal triangle, 

 anterior rays running outward and backward to the eyes, 

 posterior rays overspreading the paired ocelli. Balance of 

 head yellow, excepting two vertical tubercles and two 

 smaller black, shining spots at lateral angles of frontal 

 triangle. 



Prothorax quadrate, nearly twice as broad as long, with 

 broad yellow median stripe divided with black on the 

 middle suture and bordered outside by an obscure line of 

 blackish, embossed markings ; a few larger embossed 

 markings farther out, half way to the lateral margin. 

 Thorax broadly lined with black on all sutures. Legs, 

 lineate with black on all carinae with a sharp transverse 

 band at each joint and a diffuse one a little above each 

 knee joint. 



Abdomen blackish on sides, yellowish beneath, with 

 interrupted transverse rows of black dots across the 

 middle of the segments. 



The wings are hyaline with brown veins. There is a 

 full complement of costal crossveins, and there are in the 

 type a few extra crossveins between the branches of the 

 radial sector. 



Miss Smith doubtfully referred this species to Dictyo- 

 genus, noting at the time that it lacked a strong basal 

 angulation of the 1st anal vein in the fore wing, and that 



