28 buijietix 826, r. s. department of agriculture. 
Semis THERIOAPHIS Walker. 
: late IV, K, L. 
ISffl Tha .".ker. The Zoologist, p. 1999. 
1905. ;: : : : m I : -_-.-- .37 . 417. 
1906. Eve - .home den, Ann. Ent. Soc. Belg.. v. 50, p. 31. 1 
- - " - " - j-s Van der Goot., Beitrage znr Xennt. der Eoll. Blattla use., p. 320. 
The genus Therioaphis Walker was erected with ononidis Kalt. as 
type, and ononidis has been shown by Theobald to be the common 
"yellow clover aphis." trifolii of Monell. This species has a deeply 
cleft anal plate quite different from that of Aiyzoealiis. Eueallipterus 
was erected with iiliae L. as type, a species with quite similar struc- 
ture. Eueallipterus. therefore, will become a synonym. Betulicola 
Kalt. has been used as type by ELirkaldy and Van der Goot. Accord- 
ing to Das. Van der Goot considers this congeneric with trifolii. 
Therefore Therioaphis is the name that must be used. 
. — mi Les truncate rathei ostaicted niesad of apex. Antemite ci six 
_ ents without prominem hairs and armed with snbeircular sensoria. Fore wings 
with media twice branched : hind wings with both media and cubitus present. Wings 
often variously marked. Pro:'. . . :her elongate: cauda knobbed. Anal plate 
ly bifid s that two long, narrow lobes are formed. Body often with prominent 
- 
Type (monotypical), Aphis (menials Kalt. 
Genus EUCERAPHIS Walker. 
Plate IV ■;. 
182 .V xrapMa Walk r. Tbs Zoo! ist, ] - 
1908. ""_-""■ s MordtwOko, Ann. V-qs. Zool. I'Aead. Imr. ". - i ; :. Petersboi:--:. ~ . - "" 
^nder Goo :, Tijd. voor. Ent. ." , p. 151. 
.en Walker erected his genus Euceraphis with betulae L. as type 
he had in mind evidently the same species as that described by Koch 
under the same specific name, and thus separated species of this 
type. Mordvrilko in 1900 erected the genus CaUipteroides with 
'tarsus Heyden as type. Specimens of this species received from 
Mi rdwilko show that the species he had was the betulae of Koch or 
at least a species very close to it. This would then make CaUipte- 
roides a synonym of Euceraphis. In 1913 Van der Goot used the 
name CaUipteroides with betulae Koch as type and his placing, there- 
fore, should be under Euceraphis. 
. — amides present, truncate. Antenna of six segments, 1 . :-_ and slender. 
armed with rather narrow sensoria usually near the base of segment III, the unguis 
of segment VI usually not much longer than the base, sensorium at the base of m . - is 
d _■ :val, and fringed: more or less distinct frontal tubercles present. Fore 1 ingswith 
the media twice branched, hind wings ... :h media and cubitus present. Cauda 
lly knobbed and rather large. Anal plate usually entire. Abdomen of the alate 
form often with distinct wax-producing glands. Forms very large and usually solitary 
in ha : - . e similar to the other forms: oviparous female producing several eggs 
nxed by Walker, .1870), ApJti Walker 
1 There is considerable evidence for keeping thisf act. 
