GENERIC CLASSIFICATION OF APHIDIDAE. 67 



Genus GEORGIA Wilson. 

 Plate IX, U-Z. 

 1911. Georgia Wilson, Can. Ent., v. 43, p. 64. 



The genus Georgia appears to be related to Colopha Mon., and yet 

 many of the characters are so like those of Eriosoma that the insect 

 suggests that genus also. Especially to the species E. americanum 

 Riley there is a striking resemblance. Prominent wax glands are 

 lacking but these are sometimes also lacking in the spring forms of 

 Eriosoma. 



Characters. — Cornicles present and situated on shallow hairy cones as are those of 

 Eriosoma. Stem mother with five-segmented antennae ; alate form with six-segmented 

 antennae which are armed with narrow sensoria that do not encircle the segment to 

 any extent. Fore wings with the media once branched, hind wings with only one 

 oblique vein. Cauda rounded. Prominent wax pores such as those present in 

 Eriosoma lacking, but small wax areas present. 



Forms living in pseudogalls on plants, the alate individuals migrating from the 

 galls in the early spring. 



Type (mono typical), Georgia ulrni Wlsn. 



Genus GOBAISHIA Matsumura. 



Plate X, A-G; XI, V. 



1909. Byrsocrypta Tullgren, Arkiv for Zoologi, Bd. 5, no. 14, p. 182. 



1917. Gobaishia Matsumura, Synopsis of the Pemphigidae of Japan, Gifu, Japan, p. 75. 



Tullgren used the name Byrsocrypta Hal. as the name of a sub- 

 genus with pallida as type, placing it under Tetraneura. He appar- 

 ently overlooked the fact that Westwood had set bursarius as the 

 type of the genus Byrsocrypta as will be found discussed under the 

 genus Pemphigus. Pallida is different from the species of Tetraneura, 

 in that the cubitus is retained in the hind wing. If Colopha is retained 

 on account of the branched nature of the media in the fore wings it 

 will be necessary to place pallida as typical of a genus related to 

 Tetraneura. 



In 1917 Matsumura erected the genus Gobaishia with GobaisMa 

 japonica Mats, as type. This species was stated to be very similar to 

 Tetraneura alba Ratz. Tetraneura alba Ratz is the same species as 

 Eriosoma pallida Haliday and the characters given for the genus are, 

 therefore, similar to Tullgren's conception of Byrsocrypta. The 

 figures drawn are from specimens of pallida as no japonica was avail- 

 able to the writer for study. 



Characters. — Cornicles present, stem mother with four-segmented antennas, alate 

 forms with six-segmented antennae which are armed with annular sensoria. Fore wings 

 with the media usually simple; hind wings with both cubitus and media present. 



Type (fixed by Matsumura, 1917), Gobaishia japonica Mats. 



