XXll ILLUSTRATIONS 



FIGURE PAGE 



349. The same. From Hindle, after Roubaud 134 



350. Maggot of the common House-fly (fig. 262). From Howard 134 



351. The same, lower surface. From Howard 134 



352. Young larva of a Mosquito (fig. 335). From Hindle 134 



353. Pupa of the Corn Syrphid (fig. 318). Bur. Ent 134 



354. Pupa of the ISIorelos Orange Fruit-fly (fig. 317). Bur. Ent 134 



355. Pupa of the Horn-fly (fig. 278). Bur. Ent 134 



356. Pupa of a Tsetse Fly (figs. 322-326). From Austen 134 



357. The Dog Flea {Cteuocephahis canis), adult. Bur. Ent 136 



358. The Sticktight Flea {Echidiiophaga gallinacca). Bur. Ent 136 



359. The Human Flea {Pulex irritans). Bur. Ent 136 



360. The Jigger Flea or Chigoe {Tiinga penetrans); a female before entering 



the skin. Bur. Ent 136 



361. The same, a fertile female. Bur. Ent 136 



362. The same on the third day after its entrance under the skin of the human 

 body. Bur. Ent 136 



363. The same, a fully grown female. Bur. Ent 136 



364. The egg of the Dog Flea (fig. 357). Bur. Ent 136 



365. The maggot or larva of the European Rat Flea {Ccratophylliis fasciatus). 

 Bur. Ent 136 



366. Larva of the Jigger Flea (figs. 360-363). Bur. Ent 136 



367. Pupa of the Dog Flea (fig. 357). Bur. Ent 136 



368. The European Pine Saw-fly {Di prion simile), male; this has recently 

 been introduced into New England, and the individual figured came 

 from Connecticut. From Aldrich, S. 1 136 



369. The same, female. From Aldrich, S. 1 136 



370. A gall-forming Saw-fly {Euura macgillivrayi) from Colorado. From 

 Aldrich, S.I 142 



371. A Horn-tail {Tremex columba). Bur. Ent 142 



372. The wood-boring grub of the preceding, with a j'oung grub of the large 

 ichneumon Mcgarhyssa feeding on it. Bur. Ent 142 



373. A bullet gnawed by a wood-boring grub. Bur. Ent., after C. R. Dodge. 142 



374. A Wheat Saw-fly (Cephiis pygmmus). Bur. Ent 142 



375. The Sweet Potato Saw-fly {Schizocerus cbcnus). Bur. Ent 142 



376. Young of the preceding. Bur. Ent 142 



377. The Willow-leaf Saw-fly {Cimbex americana). Bur. Ent 142 



378. Young of the preceding. Bur. Ent 142 



379. A Wheat Saw-fly {Nematus marylmidicus), male. Bur. Ent 142 



380. The same, female. Bur. Ent 142 



381. The same, j'oung. Bur. Ent 142 



382. The adult of the Yellow-spotted Willow Slug {Nematus ventralis). 

 Bur. Ent 142 



383. The Yellow-spotted Willow Slug; the young of the preceding. Bur. 



Ent 142 



384. A Wheat Saw-fly {Dolcrus arvcnsis). Bur. Ent 142 



385. The adult of the Rose Slug {Monostega rosae). Bur. Ent 142 



386. The Rose Slug, the young of the preceding. Bur. Ent 142 



