80 BULLETIN 826, U. S. DEPARTMENT OF AGRICULTURE. 



Tycheoides Schouteden makes plain that he is naming the Tychea 

 of Passerini and yet he sets a different type. He further states: 

 *'Le genre Tychea est vraisemblablement destine a desparaitre, ses 

 especes appartenant en 'realite a Tetraneura ou Byrsocrijpta." He 

 evidently is speaking here of the Tychea of Koch, since specimens of 

 Tycliea Pass, do not possess the cornicles of either of the two genera 

 mentioned. 



In describing Kaltenbachiella Schouteden gives as a character the 

 four-segmented antennae etc., of the apterous form. The alate 

 form he did not know, but from his description of the pupa it evi- 

 dently would possess six-segmented antennae. There seems little 

 doubt that this is another such case as -squamosa where the apterous 

 form has often four-segmented antennae, although five is the normal 

 number, the alate form normally having six. Hart's description 

 has led Schouteden astray and he places Geoica close to Forda, 

 separating it therefrom by the venation of the hind wing. Consider- 

 ing all of these facts there seems little doubt that Kaltenbachiella 

 should be placed as a synonym of Geoica. 



Specimens of pliaseoli show very similar characters in every 

 respect. It is true that the antennas are somewhat longer and the 

 hairs simple, but in every respect of importance the insects agree. 

 The apterous form has five-segmented antennae and the alate form 

 has six-segmented ones with the sensoria very similar in nature. 

 The cauda also is very similar. It is evident then that Tychea 

 Pass, and Tullgrenia Y. d. Goot become synonyms of Geoica Hart. 

 Specimens of lucifuga Zehntner show a remarkable resemblance to 

 squamosa with the exception, of course, of the squamae. The apterous 

 form has five-segmented and the alate form six-segmented antennae. 

 In general form and structure of the caudal extremity the insects are 

 the same and, therefore, Serrataphis V. d. Goot will become a syno- 

 nym of Geoica. There remains, then, to discuss the genus Trifidaphis 

 Dei Guercio. The co types of the type species show a close resem- 

 blance to 'the general type of squamosa. The apterous forms have 

 five-segmented antennae and in the alate form, as in squamosa, some 

 forms have five segments and some forms have six. The general 

 resemblance in other respects seems to prove that Trifidaphis is a 

 synonym of Geoica. 



It should be pointed out that the sexes described by Hart are in all 

 probability not sexual forms, but immature specimens. 



In 1013 Del Guercio erected the genus Trinacriella for his new 

 species magniflca. He gave a brief description stating that the 

 apterous forms had five-segmented antennae and the alate forms six. 

 No specimens of this species are available to the writer, but there 

 seems little doubt that Trinacriella will become a synonym of Geoica. 



