OF WASHINGTON. 9 



covering the loth, with a scar each side, and a middle area very dis 

 tinctly separated from the sides by nearly parallel carinae. 

 Length to tip of wings, $, 34 mm., $, 39 mm. 



One pair from Oregon, from a Mr. Warren. 

 To show the position of this species in the genns, I have 

 tabulated our forms for both sexes, as follows : 



MALES. 



1. Ninth ventral segment elongate, tapering to the notched tip, and cov 



ering the loth segment, its surface minutely transversely striate..4 



Ninth ventral segment short, broadly truncate at tip, not covering the 



loth ; rugose, but not finely striate 2 



2. Middle area of Qth ventral segment with nearly parallel sides. spinosa 

 Middle area of pth ventral segment much broader at base than at tip . . 3 



3. The scar or concavity on sides of Qth segment not reaching the base, 



californica 

 The scar extending to base proteus 



4. Notch at tip of Qth segment small nobilis 



'Notch at tip deeper and broader regalis and pictctii 



FEMALES. 



1. Eighth ventral segment without median processes or teeth 4 



Eighth ventral segment with two projections from the middle part. .2 



2. From middle of 8th ventral segment arise two long, divaricate proc 



esses, fully four or five times as long as broad at base spinosa 



Two short teeth, barely longer than broad at base on the posterior 

 margin of the 8th ventral segment 3 



3. The two teeth but little more than their diameter apart. . . .californica 

 The two teeth plainly more than diameter apart pictetii 



4. The 8th ventral segment triangular proteus 



The 8th ventral segment truncate at tip regalis and nobilis 



Mr. Heidemann exhibited specimens of a new species of 

 Corythuca and of other species of the genus for comparison, 

 and presented the following paper : 



