80 BULLETIN 82S, 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 genie Tychea est vraisemblablement destine a, desparaitre, ses 
especes appartenant en realite a Tetraneura on Byrsocryj)ta." He 
evidently is speaking here of the Tychea of Koch, since specimens of 
Tychea Pass, do not possess the cornicles of either of the two genera 
mentioned. 
In describing Kaltenbachiella Schouteden gives as a character the 
four-segmented antenna?, 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 For da, 
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 phaseoli show very similar characters in every 
respect. It is true that the antennae 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 V. d. Goot become synonyms of Geoica Hart. 
Specimens of lucifuga Zehntner show a remarkable resemblance to 
squamosa with the exception, of course, of the squama?. 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 Y. d. Goot will become a syno- 
nym of Geoica. There remains, then, to discuss the genus Trifidaphis 
Del Guercio. The cotypes of the type species show a close resem- 
blance to the general type of squamosa. The apterous forms have 
live-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 b}^ Hart are in all 
probability not sexual forms, but immature specimens. 
In 1913 Del Guercio erected the genus Trinacriella for his new 
species magnifica. 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. 
