226 Journal New York Entomological Society, t^'o^- xxii. 



growing slowly and maturing in September. The cocoons are prob- 

 ably spun in crevices on the ground, possibly in bark, as they are 

 rather weak in structure and not adapted to be formed among leaves 

 or loose earth. 



The distribution of the species appears to be from New York as 

 northern limit southward to the Gulf of Mexico. Recorded localities 

 are New Jersey, West Virginia, North Carolina, Missouri and Texas. 



The other three described species of Monolcnca are all known only 

 from central Florida. 



Criticism of Previous Descriptions. 

 No description of the larva was extant, but recently in looking 

 over the notes at the Bureau of Entomology, Department of Agri- 

 culture, I found a description by Dr. Riley, which I had published in 

 the Proceedings of the Washington Society. Dr. Riley's description 

 is excellent for one of its brevity. He did not fail to note the obvious 

 relation of the larva to that of Eiiclea delphinii. The even more 

 obvious relation to Parasa indetcrmina is not mentioned; but I think 

 that larva was unknown to Dr. Riley, at least with its identification 

 complete. 



Description of the Several Stages in Detail. 



Egg. — Elliptical, gently flattened, uniform, shining pale yellow. 

 Size .8 X -6 X -3 "mi- Laid in patches of 20 or more, the eggs well 

 spaced, separated from each other by nearly the (liamctor of an egg 

 and covered loosely with short, stiff, white hairs that do not conceal 

 the eggs but stand up loosely some .5 mm. Surface rather coarsely 

 flatly hexagonally marked, without lines. The hair covering is com- 

 posed chiefly of short white hairs, pointed at both ends, straight or 

 slightly bent at one end. 



Stage I. — Head rounded, pale yellow, with large black coelli and 

 projecting mouth. Thoracic feet small, pointed, normal, pale yellow. 

 Body short, thick, rounded, normal, with two rows of short conical 

 tubercles with three seta; from each. All pale yellow. The larva is 

 more elongate when walking. Sides perpendicular, dorsum broad, 

 slightly depressed centrally. The tubercles form 11 horns in the 

 upper row, 9 in the lower, each with three rather long, fine, pale hairs 

 with minutely bulbous tips. Later the body is yellow, the horns white. 



