14 Journal New York Entomological Society. [^ '^j'- >^>^iii- 



quite parallel and somewhat sinuated ; humeral angles rounded ; 

 anterior angles prominent. Last ventral segment with the notch 

 about half as deep as the segment is long and broadly V-shaped. The 

 venation is the same as in mariposa, but the basal areole is clear 

 instead of fuscous as in that species, riuiosa, vividiizcci, etc. The 

 costa is greenish yellow edged in part with black. There is the 

 usual fuscous and orange colors at the base of all of the wings and 

 the flaps are bright orange, on the hind wings clouded with fuscous. 

 The dorsum of this species is black variegated with bright orange. 

 Head black with the supra-antennal plates touched with orange ; 

 the pronotum is very narrowly edged with orange anteriorly and with 

 a little broader band on the posterior margin and humeral angles ; 

 the slightly sinuated sides are black. The mesonotum has the orange 

 spot on the top of the X divided by a black line and the four spots 

 in front of the X are arranged in a semi-circle. The posterior margin 

 is narrowly bordered with orange, and there are two orange spots 

 at the base of each fore wing. The posterior part of the metanotum 

 is edged with orange. The dorsum of the abdomen has all of the 

 segments, except the basal one, narrowly edged on their hind margins 

 with bright orange, the stripes being about obliterated along the 

 median line. On the second segment the stripe is broader than on 

 the others, but is absent dorsally. Beneath, the abdominal segments 

 are black edged posteriorly with bright orange. All of the femora 

 are striped with orange and black. The lower surface is thickly 

 clothed with very long, light colored hairs, which are to be found 

 even on the legs out to the tarsi ; on the hind tibiae they are about 

 twice as long as its diameter. When viewed from above the hairs 

 from the lower surface are seen to form a fringe about the body. 



The female type in the collection of the x\merican Museum of 

 Natural History is the only specimen seen by the writer. 



Okanagana triangulata luw species. 



Type male, Mendocino Co., California, May lo, 1910. 



The triangular or obconical black area at the base of the abdomen 

 is a conspicuous character of this insect. Length 21 mm.; to tip of 

 the wings 25 mm. ; fore wing 8 by 20 mm. Head small and narrower 

 than the front margin of the prothorax; the front produced and a 

 little blunter than in syiiodica; the supra-antennal plates with outer 



