404 



PSYCHE. 



[February 1S93. 



white, containing tubercle i and a very narrow 

 dark dorsal line. The anal plate (/. e., joint 

 14 or the tenth abdominal segment) is vinous. 

 Lateral and subventral tubercles pale. 

 Thoracic feet black. 



Third stage. — Head rounded, median 

 suture deep, shiny black, hairy ; width 1.8 mm. 

 Warts rather large, each with a hair, and 

 other somewhat shorter hairs arise from the 

 body. Color vinous black with pale yellow 

 dorsal patches on joints 3 and 4, 6, 9 and 10 

 and 13 anteriorly, enclosing warts i and ii. 

 A dark dorsal line, each side of which are a 

 few yellow mottlings on the dark segments; 

 subventral warts largely yellow, the others 

 concolorous with the markings except row 

 i which is dark on the yellow segments. 

 Setae all blackish. Later, joints 5 and 12 are 

 seen to be a little enlarged dorsally, a narrow, 

 broken, waved line appears along warts i in 

 the yellow markings, the yellow patch on 

 joints 9 and 10 extends faintly on joint 11, 

 there is a broken, irregular, yellow, super- 

 stigmatal line, distinct only on the yellow- 

 marked segments and some rather more 

 continuous yellow mottlings along the sub- 

 stigmatal ridge. 



Fourth stage. — Head rounded, clypeus 

 depressed, median suture deep; hair short, 

 dense, white; color black, slightly shiny, 

 brownish centrally in the depression around 

 the median suture; width 3.0 mm. Warts 

 rather large, rows i and ii on joints 3, 4, 6, 9, 

 10 and 13 and all the subventral warts yellow, 

 the others black. Joints 5 and 12 enlarged 

 dorsally, velvety black. Color purplish 

 black, a broad, yellow, dorsal band except on 

 joints 5 and 12, containing a broken, triple, 

 dorsal line, fainter on joints 7, 8 and 11. The 

 rest of the body is purplish black, the sub- 

 ventral region included. Hair dense, white, 

 consisting of fine short hairs from the body, 

 with single, slightly longer and larger ones 

 from the warts. As the stage advances a 

 marked change takes place. A broad pale 

 grav dorsal band, containing very faint triple 

 dark line, obsolescent and broken ; warts 



i and ii orange, except on joints 2 and 5, 

 row ii on joints 3, 4, 6, 9, 10 and 13 broadly 

 orange; a broad, pale bluish, subdorsal band, 

 heavily mottled with vinous black; joints 5 

 and 12 dorsally, and lateral spots on all seg- 

 ments (most distinct on joints 3-5), velvety 

 black. A broad, broken, deep orange, stig- 

 matal band, divided by an irregular black 

 stigmatal line and consisting of orange spots 

 spreading from the warts of rows iv and v 

 and adjacent mottlings, barely confluent. 

 Venter blackish ; thoracic feet shiny black. 



Cocoon. — Not different from the house 

 made at the end of each stage, except that 

 there are a few transverse threads to support 

 the pupa. 



Pupa. — Small but robust. Dorsal outline 

 arched, ventral nearly straight, rounded at 

 both ends; cremaster, a long spine of even 

 thickness throughout. Smooth, shining; 

 abdomen very slightly punctured. Color 

 red-brown, darker ventrally and dorsally, 

 nearly black on the thorax and cases, with a 

 green tinge on the latter. Length 13 mm. ; 

 width 4.5 mm. There are two broods each 

 year. 



Food plant. — Willow (Salix). 



Habitat. — Oregon and Washington west 

 of the Cascade range and, probably, also 

 western British Columbia. Found by Prof. 

 O. B. Johnson at Seattle, Wash. Larva 

 from Portland, Oregon. 



The Morphology and Phylogeny of In- 

 sects. 



The Annals and magazine of natural his- 

 tory published in December last a translation 

 of the concluding general portion of a me- 

 moir by N. Cholodkowsky on the embryonal 

 development of Phyllodromia germanica 

 (Mem. acad. St. Petersb., 7 s6r., v. 38, 1891) 

 which closes with the following summary. 

 It will prove interesting and suggestive to 

 American entomologists. 



1. The head of insects contains more than 

 four protozonites, probably six, of which 

 one is preoral, but the rest are postoral. 



