12 Bulletin 2: Springfield Museum. 



A roughened, irregular, many-celled gall, rising very abruptly from 

 the side of the twig. Woody, knotty. Two or more crowded together, 

 or occurring singly, 5-Jo mm. long, 5-10 mm. wide. On willow, Salix. 

 September. 



Oryptocampus nodus Walsh. 



Euura salicis-nodus Walsh, Proc. Ent. soc Phil., 1866, v. 6, p. 253 254. 



Norton, Trans. Amer. ent. soc, 1867, v. 1, p. 82-83; 1£P8, v. 2, p. 368. 

 Cryptocampu8 salicis-nodus Rohwer, Journ. N. Y. ent. soc, 1909, v. 17, p. 1516. (Further 



bibliography.) 



A gradual enlargement of the twig, usually around the twig, and sev- 

 eral near one another. Polythalamous. From twice to several times the 

 diameter of the twig. 1-3 cm. long. Larvae sometimes remain in gall 

 over winter, sometimes go under ground. Emerge in April or May. On 

 willow, Salix sp. 



Cryptocampus ovum Walsh. Willow egg-gall. Fig. 12. 



Euura salicis-ovum Walsh, Proc Ent. soc. Phil., 1866, v 6, p. 251-252. 



Norton, Trans. Amer. ent. soc , 1867, v. 1, p. 80-82. 

 Euura ovum, Beutenmiiller, Ins. galls vicin. N. Y., 1904, p. 24, fig. (Not sufficient for 

 identification ) 

 Jarvis, 37th aim. rept. Ent. soc. Ontario, 1906, p. 69 

 Cryptocampus salicis ovum Rohwer, Journ. N. Y. ent. soc, 1909, v. 17, p. 12 14. (Further 



bibliography.) 



This monothalamous gall consists of a deformed hud the tip of which 

 persists. The gall varies considerably in size and shape, sometimes 

 nearly spherical, again elliptical or ovoid, and tapering. When mature 

 the larval cell is surrounded by a red-brown spongy mass, containing 

 fibers transverse to the stem. Rather common on willow, Salix sp. 

 Insect remains as larva during winter. Some apparently pupate under- 

 ground. Imago in April. 



Salix cordata. 

 Nematus pomum Walsh. Willow apple-gall. 



Nematus salicis-pomum Walsh, Proc. Ent. soc. Phil., 1S60, v. ri, p. 255. 



Norton, Trans. Amer. ent. soc, 1867, v. 1, p. 216 218. (Quotes 

 Walsh's description.) 



Walsh and Riley, Amer. ent., 1870, v. 2, p. 45, fig. 30. 



Cook, Ohio nat., 1904, v. 4, p. 122, 127, 143, fig. 93, 110, 127. 

 Nematus pomum, Beutenmiiller, Bull. Amer. mus. nat. hist., 1892, v. 4. p. 263. 



Rounded, fleshy leaf-gall, about 1 cm. in diameter. Green with rosy 

 cheek. Appears early in the spring, matures by late July. Insect 

 emerges the following April. Common on heart-leaved willow. Salix 

 cordata. 



JUGLANDALES. 

 JUGLANDACEAE. 

 Hicoria (Carya.) 

 Phylloxera caryaecaulis Fitch. Hickory louse-gall. 



Pemphigus caryaecaulis Kitch, 1st rept. ins. N. Y., 1855, p. 859-860. 



Dactylosphaera caryae-magnum Shimer, Trans. Amer. ent. soc, 1869, v. 2, p. 391. 



