GALL APHIDS OF THE ELM. 2O5 



fifth nearly equal in length ; sixth very short, but little exceeding the 

 first and second united. The antennae as compared with the body are 

 very short, scarcely reaching to the base of the front wings; not tapering. 



"Wingless individual. — Body covered with a cottony substance; beak 

 short, not extending to the base of the second pair of legs. No honey- 

 tubes. Length of the body .06 of an inch; to tip of wings .10 of an 

 inch, (sic.)* 



"This species was found September ist, 1877, on the upper leaves and 

 fruit stems of a species of grass (Bragrostis poacoides var. nicgas- 

 tacliya). the blades of the grass folding over the insects. 



"It is also found on some species of Panicunt. 



"This evidently belongs to Mr. J. Monell's new genus Colopha, as the 

 third vein of the front wing is but once forked, the hind wings have 

 but one discoidal vein, and the antennae are six-jointed." 



Bibliography. 

 It is with some hesitancy that I attempt a bibliography for 

 iilmicola. Mr. Monell (The Can. Ent. IX, page 103) refers to 

 such bibhography of this species as appeared before 1877 as 

 a "Comedy of Errors," and as Mr. Hunter's Hst (1901) con- 

 tins eight errors (some minor) the cock's comb gall louse is 

 still apparently a difficult species in a literary way. Eight or 

 more authorities who have attempted references have added to 

 the confusion. The following list is therefore offered some- 

 what timidily, though hopefully. The accounts which I have not 

 personally seen are cited in ( ). For the accuracy of the 



others I am responsible. 



1858 (Pub. 1859). Brysocrypta ulmicola Fitch. Fifth Report Ins. N. Y. 

 Trans. N. Y. St. Agric. Soc. Vol. XVIII, p. 843, 

 paragraph 347 (63rd page of 5th Report, paragraph 

 347). Original description of galls, stem-mother, 

 and n3anphs. 



(1861. Osten Sacken, Stett. Ent. Zeit. 22: 422). 



1862. Thelaxes ulmicola Walsh, Proc. Ent. Soc. Phil. Vol. I. pp. 304, 

 305, original description of winged form. p. 297, Fig. V. and 

 table. 



(1866. Walsh. Pract. Ent. i: 114; 2: 8.) 



1869. Thelaxes ulmicola, Walsh and Riley. American Entomologist. 

 Vol. I, p. 108. Description of insect and gall and Fig. 90 of 

 gall. Also p. 224 mere mention. 

 1869. Thelaxes ulmicola, Packard. Guide : p. 523. 



"Pemphigus ulmicola of Fitch" Packard. Guide: P. 524-525, 



*Sn it stands in the original description but it is evident that these 

 measurements were taken for the Zi'ingcd and not iviuglcss indizidual. 



