900 , PROCEEDINGS OF THE NATIONAL MUSEUM. vol. xxvii. 



TRICHOCHLAMYS LACTEATA Packard. 



No specimens; one in Mr. Cockle's collection, Auo^ust 8 (South Fork 

 Creek), a little smaller and more shaded with brown than specimens 

 from Wellington, Oregon, and California. 



PETROPHORA ABRASARIA Herrich-Schaeffer. 



Twenty-two specimens, June 23, 25, 26, 30, July 2, 10, 11 (Ains- 

 worth), 18, 19, 21 (Bear Lake), 23, August 4, 9 (South Fork Creek), 

 11 (South Fork Creek), and one from Mr. Cockle's collection, July 10 

 (Ains worth). Eggs were obtained from captive females, but the larvas 

 could not be carried beyond the second stage on account of their 

 propensity to hibernate. 



Egg. — Elliptical, compressed, one end very strongly depressed, 

 wedge-shaped from side view, ends rounded, the large one scarcely 

 flattened. Cell areas depressed, flat-bottomed, the reticulations low, 

 raised, corrugated, or wrinkled transversely, pentagonal to hexagonal. 

 Pale yellow; size, 0.8 by 0.6 by 0.5 mm. 



Stage I. — Head rounded, brown black, scarcely bilobed, darker on 

 the sides; width, 0.3 mm. Body short and stout, the segments wrinkly 

 annulate, feet normal, moderate. Yellowish white, with lines of fine 

 blackish dots along the sides, indefinite yet distinct subdorsal, lateral 

 and subventral rows. Cervical shield, anal leg shields and thoracic 

 feet smoky. Tubercles minute; set?e short, bladder-shaped; skin 

 minutely granular, the dots of the illy-defined dark bands underlying 

 the granules. 



Stage II. — Head rounded, dark brown, darker on the sides; width, 

 0.55 mm. Bod}^ moderate, somewhat flattened, dorsum pale brown, 

 with dorsal and sul)dorsal darker lines. Sides dark brown; subventral 

 region broadh' pale, like the dorsum; venter also pale, with faint 

 darker lines, subventral and medioventra. Tubercles and setfe obscure ; 

 no shields. 



PETROPHORA CONVALLARIA Guenee. 



Twenty specimens, Jmie 8, 9, 16, 19, 22, Jul}- 4, 30, September 5 

 (Victoria), Sandon (G. C. Bobbins). After carefully studying Guenee's 

 description with Mr. G. W. Taylor, I am satisfied that we have cor- 

 rectly identified this species. Hulst's neinweUa from Alaska is scarcely 

 more than a color variety of this, and both will be found to unite with 

 the European munitata Hiibner. I shall describe the larva in Life 

 Histories of North American Geometridw, LXI. 



PETROPHORA DEFENSARIA Guenee. 



Four specimens, June 1, August 21 (Revelstoke), 25 (Victoria), 26 

 (Victoria), and one from Mr. Cockle's collection, August 14, 1901. 

 This is very closely allied to iiiunitata (^—convaUana—neiiiorellci).) but 



