378 
The Ohio Naturalist. 
[Vol. XV, No. 2, 
Fig. 3. Salix longifolia affected by the gall-gnat Rhabdophaga 
brassicoides Walsh. 
Cecidomyia salicis-brassicoides Walsh. Proc. Ent. Soc. Phil. 111:577. 
Cecidomyia brassicoides Beutenmueller. 
Stebbins, Bull. 2 Springfield Museunv.il. 
Twig-gall, evident as telescoping of terminal twig-structures, 
with abnormal down-production, and great broadening of leaves, 
whole extending back 10 cm. or more. Frequent. 
Fig. 4. Salix longifolia affected by the gall-gnat Rhabdophaga 
strobiloides O. S. 
Cecidomyia strobiloides Osten Sacken, Mon. N. A. Dipt. pt. 1:203. 
Cecidomyia salicis-strobiloides Walsh. 
Stebbins, Bull. 2, Springfield Mus.:ll. 
Terminal bud-gall, showing as a rounded conical mass of 
closely appressed scale-like leaves. Green, with a whitish silky 
covering. 2.5-3 x 4 cm. Usually abundant, but scarce this year. 
Fig. 5. Salix sp. affected by a saw-fly, probably Crypto¬ 
campus nodus Walsh. 
Euura salicis-nodus Walsh. Proc. Ent. Soc. Phil. VI:253. 
Cryptocampus salicis-nodus Rohwer. 
Stebbins, Bull. 2, Springfield Mus.:12. 
Twig-gall, being a spindle-shaped enlargement of the herba¬ 
ceous or young woody twigs, concentric with the stem as a rule, 
about 1 cm. in diameter, and ranging up to 3.5 cm. in length. 
Color that of normal twig. 
Fig. G. Salix longifolia affected by the saw-fly Pontania 
pomum Walsh. 
Nematus salicis-pomum Walsh. Proc. Ent. Soc. Phil. VI:255. 
Nematus pomum Beut. 
Cook, Appendix to Ins. Galls Ind.:o. 
Leaf-gall, spherical to spherical constricted, on lower surface, 
and projecting slightly through. 5-10 mm. diameter. Color 
ranging from light green to red, depending upon light relation. 
Minute cork-specks frequently present. Very common. July 1st. 
Fig. 7. Salix longifolia affected by the saw-fly Pontania 
desmidoides Walsh. 
Nematus salicis-desmidoides Walsh. Proc. Ent. Soc. Phil. VI:257. 
Nematus inquilinus Walsh. 
Pontania inquilina Marlatt. 
Cook, App. Ins. Galls Ind.:5. 
Leaf-gall, flattened bean-shaped, bisected by leaf, usually 
centered on a lateral vein, one to several galls on a leaf. 5-8 mm. 
long, 4-5 mm. broad and thick. Color various, usually crimson. 
Abundant in a restricted area. July 23. 
