10 



PARASITES OF GIPSY AND BROWN-TAIL MOTHS. 



Page. 

 Plate XVI. View of out-of-door insectary used for rearing predaceous 



beetles in 1910 204 



XVII. Fig. 1. — Wire-screen cages used in tachinid reproduction work 

 in 1909. Fig. 2. — Cylindrical wire-screen cages used in 



tachinid reproduction work in 1910 204 



XVIII. Fig. 1. — Blepharipa scutellata: Full-grown larva from gipsy- 

 moth pupa. Fig. 2. — Blepharipa scutellata: Puparia 21& 



XIX. Fig. 1. — Importation of gipsy-moth caterpillars from France in 

 1909; en route to laboratory at Melrose Highlands, Mass. 

 Fig. 2. — Importation of gipsy-moth caterpillars from France 



in 1909; receipt at laboratory, Melrose Highlands, Mass 21ft 



XX. Fig. 1. — Compsilura concinnata: Puparia. Fig. 2. — Tachina 

 larvarum: Puparia. Fig. 3. — Sarcophaga sp.: Puparia. Fig. 



4. — Parexorista chelonix: Puparia 220 



XXI. Fig. 1. — View of laboratory interior, showing cages in use for 

 rearing parasites from hibernating webs of the brown-tail 

 moth in 1910-11. Fig. 2. — Sifting gipsy-moth egg masses 



for examination as to percentage of parasitism 244 



XXII. Map showing sections of its range in New England from which 

 Monodontomerus sereus has been collected in hibernating 



webs of the brown-tail moth, and subsequently reared 24& 



XXIII. Map showing distribution of Monodontomerus sereus in New 



England 248 



XXIV. Map showing dispersion of Calosoma sycophanta in Massachu- 

 setts from liberated colonies 256 



XXV. Map showing distribution of Pteromalus egregius in New 



England 276 



XXVI. Fig. 1. — Riley rearing cages as used at the gipsy-moth parasite 

 laboratory. Fig. 2. — Interior of one of the laboratory struc- 

 tures, showing trays used in rearing Apanteles lacteicolor in 



the spring of 1909 280 



XXVII. View of laboratory interior, showing cages in use for rearing 

 parasites from hibernating webs of the brown-tail moth in 



the spring of 1908 280 



XXVIII. Fig. 1. — Cocoons of Apanteles lacteicolor in molting web of the 

 brown-tail moth. Fig. 2. — View of laboratory yard, showing 

 various temporary structures, rearing cages, etc 284 



TEXT FIGURES. 



Fig. 1. Polygnotus hiemalis, a parasite of the Hessian fly 21 



2. Polygnotus hiemalis: Adults which have developed within the "flax- 



seed " of the Hessian fly and are ready to emerge 21 



3. Lysiphlebus tritici attacking a grain aphis 22 



4. The Australian ladybird (Novius cardinalis), an imported enemy of the 



fluted scale: Larva?, pupa, adult, work against scales 25 



5. Rhizobius ventralis, an imported enemy of the black scale: Adult, larva . 31 



6. Scutellista cyanea, an imported parasite of the black scale 32 



7. Pediculoides xentricosus 34 



8. Erastria scitula, an imported enemy of the black scale: Adult, larva?, 



pupa 34 



9. The Asiatic ladybird (Chilocorus similis), an imported enemy of the San 



Jose scale: Later larval stages, pupa, adults 37 



10. Rearing cage for tachinid parasites of the brown-tail moth 151 







