226 



PSYCHE. 



(July, iqoi 



female without being attracted in this 

 way. 



Females of Samia cyntliia do not 

 protrude the ovipositor as much as do 

 the other Attacine moths, and are far 



less passive, flying about in as much 

 excitement as the males, and vibrating 

 their wings faster and faster when not 

 flying, quivering all over, and waving 

 their wings in a peculiar manner. 



LIFE HISTORIES OF NORTH AMERICAN GEOMETRIDAE. — XXIII 



BY HARRISON G. DYAR, WASHINGTON, D. C. 



Xanthotype crocatayia Fab. The laiva 

 and pupa of this species have been de.scribed 

 by Packard, Bowles, French and P'orbes, but 

 no complete life-history has been given. 



Egg. Laid in patches of six to twenty. 

 Elliptical, flattened, concave on two sides but 

 rounded, wedge shaped from side view, the 

 thick end flattened, subtruncate; shagreened 

 by a minute granulation and with traces of 

 hexagonal reticulations which are indicated 

 only, chiefly by the minute bordering pores 

 which appear as white specks in certain 

 lights. Shining light green. Size .7 X .5 

 X .3 mm. Later turning rather dark red. 



Stage I. Head rounded, slightly bilobed, 

 pale brownish ocherous, a narrow dark line 

 on the posterior angles, not shining, ocelli 

 black ; width .3 mm. Body moderate, 

 normal; white, subdorsal and medioventral 

 purple-brown bands, moderate, straight, 

 reaching from joint 2 to 13, the subdorsals a 

 little divergent on joints 2 and 13. Tubercles 

 and setae minute, dark, inconspicuous. Feet 

 pale outwardly; segments faintly annulate, 

 uniform, incisures not marked. Shields 

 concolorous, not cornified. On eating, the 

 color became greenish from the food show- 

 ing by transparency. 



Stage II. Head erect, rather higher than 

 wide but not above joint 2, pale luteous with 

 a blackish stripe on each side across ocelli to 



near vertex, behind which the color is whit- 

 ish ; width .55 mm. Body normal, a little 

 flattened. Dorsum whitish green, a broad 

 red-brown subdorsal stripe, divergent on 

 joints 2 and 13 to the anal feet ; sides green, 

 wliitish on subventral fold ; a ventral stripe 

 like the subdorsal but single, reaching from 

 the head to joint 13. Feet pale ; skin smooth. 



Stage III. Head rounded, somewhat flat- 

 tened before and held obliquely flat; pale 

 greenish, obscurely white streaked vertically, 

 the rather large antennae and a stripe on the 

 sides bearing ocelli white, the stripe faintly 

 dark edged before ; ocelli black ; width .9 

 mm. Body moderate, normal, a little flatten- 

 ed ; anal plate slightly pointed, anal feet 

 triangular, excavate behind with anal prongs 

 which equal the plate. Light green, four 

 white lines in the dorsum; a subdorsal (or 

 rather lateral) band of smoky brown, fainter 

 than before; a greenish white stripe on the 

 subventral fold; subventer faintly white 

 lined, the brown ventral stripe like the sub- 

 dorsal in color. Feet pale, tubercles and 

 setae small. 



Stage IV. Head rounded, squarish, flat- 

 tened but convex in front, antennae large; 

 held out' quite flat ; whitish with green tint, 

 obscurelv mottled brighter on the sides, a 

 blackish band on the lateral angle forming a 

 bend at antennae to mouth, crossing ocelli; 



