2l6 MAINE AGRICULTURAL EXPERIMENT STATION. I9IO. 



1901. Tetraneura graminis, Hunter Aphid, of N. A. Bibliography and 

 host plants. 



1886? Tetraneura colophoidea Monell mss. 



1893. Tetraneura ulmi, Osborn-Sirrine, Proc. la. Acad. Sci. i, pt. 3: 

 100 (Ins. Life 5: 237). Identity of ''iilmi" (= colophoidea) 

 and graminis suggested. 



1904. Tetraneura ulmi, Sanborn. Kansas Aphididae, Part I, pp. 23-24, 

 and Plate V, Fig. 34. Description of gall and description and 

 figure of migrant. (Name by error as is seen from descrip- 

 tion and reference). This is the first description of Tet- 

 raneura colophoidea. 



1908. Tetraneura colophoidea, Howard. Ent. News, October, 1908. p. 



365. Merely listed in paper "Upon the Aphis-Feeding species 

 of Aphelinus." 



1909. Tetraneura tihnicola, Gillette. Journ. Ec. Ent. Oct. Figs, i, 2, 



antenna. 



TETRANEURA ULMISACCULI n. sp. 



Tetraneura sp.* Patch. 



(Producing an erect pedunculated gall on the dorsal side of 

 leaf of Ulmus montana var. Camperdoum pendula. Fig. 127). 



Descriptive. 



First generation, — apterous' viviparous stem-mother. Head 

 greenish black with bronze tint. Eyes in a group of three 

 ocelli on each side of head. Antennse dusky, 4-jointed, I, 0.035 

 mm.; II, 0.035 n^ii^- ! III> o.i mm.; IV, 0.055 t^^'^- Beak ex- 

 tends nearly to 2nd coxae. Prothorax, thorax and abdomen 

 dark green with slight purple tint. Femora, tibia, tarsus dusky.' 

 Length of body 2.35 mm. ; abdomen globular. Greatest width 

 of abdomen 1.7 mm. Measurements from balsam mounts. 

 Color description from live mature specimens examined July 6, 

 1909. At this date stem mothers still plump and producing in 

 some galls, in others much shrunken. 



Habitat, — single stem mother with progeny in gall. (Figs. 

 167, 168). Maine collection number of type specimens aphid 



53-09- 



Second generanon, — migrants. Head black. Antenna black, 

 6-jointed with III, iV, V with heavy annulations, I, 0.05 mm. ; 

 II, 0.055 n^"^- .' IIIj 0.24 mm. ; IV, 0.065 mm. -0.08 mm. ; V, 



^1909. Homologies of Wing Veins of the Aphididae, Psyllidae, 

 Aleurodidae, and Coccidae. Ann. Ent. Soc. of Am. Vol. II, No. 2. 

 Plate XVII, Fig. 17. 



