IXSECTS AFFECTING PARK AND WOODLAND TREES 



pupa April 22 and by the 28th the anal filaments had begun to protrude 

 and May i the atlult emerged. May 18 the females had increased greatly 

 in size, indicating that impregnati(.)n had taken place, and on the 22d they 

 began to move from the young branches out on the twigs and on the 2^d 

 one had reached the underside of the leaf and had commenced to form its 

 ovisac. Within 24 hours the extruded white' wax formed a nearly conij^lete 

 circle about the Insect, and 48 hours later it had reached a length of 1/5 inch, 

 and was distinctly divided from the first secretion b\- a d(.-(.:ply impressed 

 line. The first wax extruded contained no eggs, but the real o\isac, com- 

 prising the last '',, inch was full of eggs which hatched June 13, and thus 

 completed the life cjxle. 



irt P u 1 V i .w, r 

 of csK sac : ^=s.ii 

 Howard. U. S. D 



eiicol.i: ,i_full i:rown female, fr 

 ill ess '.ac completed, from : 

 ,snc. Div. Ent. Bui. 22, 11, s. 



(.\fte 



Natural enemies. The only enemy observed by l)r Howard at Wash- 

 ington was a small ladybug, Hyperasjjis signata (Jliv,, which was 

 received in the lar\al condition from Knowille Fenn. Fhe lar\'a of this 

 little beetle is ver)' interesting on account of its resembling the larva of a 

 mealy bug [fig. 27]. It, or an allied species, was met with by the writer in 

 1 90 1. Prof. R. H. Pettit, who collected the insect at Ithaca in 1893, reared 

 six parasites which were determined by I )r Howanl as toUows : .\ p li )■ c u s 

 hederaceus Westw., A p h y c u s f 1 a v us H ow., C o c c o p h a g u s 



