26 BULLETIN 826, TJ. S. DEPARTMENT OF AGRICULTURE. 
6. More or less distinct antennal tubercles present; oviparous female with 
secondary sensoria Calaphis. 
No distinct antennal tubercles present ; oviparous female -without secondary 
sensoria 7. 
7. Anal plate slightly indented, sometimes almost entire; no apterous vivi- 
parous forms developed Chromaphis. 
Anal plate distinctly bilobed; apterous viviparous forms common Myzocallis. 
Genus CALAPHIS Walsh. 
Plate'IV, S, U. 
1863. Calaphis Walsh, Proc. Ent. Soc. Phila., v. 1, p. 301. 
1913. Siphonocallis Pel Guercio, Redia, v. 9, p. 293. 
1913. Callipterinella Van der Goot, Tijdschr. voor Ent., v. 56, p. 118. 
Walsh erected his genus Calaphis for his betulella, a species which 
lacks the radial sector in the wing, and on this character he based 
his genus. Del Guercio based his Siphonocallis on betulaecolens 
Fitch, distinguishing it from his conception of the genus Callipterus, 
which conception, however, was not according to type. A study of 
betulaecolens shows that in all respects, with the exception of the radial 
sector, this species is similar to hetulella. Many specimens of betulae- 
colens lack the radial sector and in most cases it is only faintly indi- 
cated at best. These two species, therefore, are probably congeneric. 
The genus Callipterinella was based on betularius Kalt., and this 
species proves to be very similar to betulaecolens. It is true that the 
frontal tubercles are not prominent in this species as they are in the 
type of Calaphis. There seems no doubt, however, that all of these 
three species are closely related. This relation is shown in part by 
the sexual forms. The oviparous females all possess sensoria on the 
antennae and are very similar in other body characters. This pres- 
ence of sensoria in the oviparous form, while not important in some 
groups, separates quite distinctly this small group of species from those 
of the Myzocallis type. It seems evident that the relations of betu- 
larius are with betulaecolens and betulella. Callipterinella, therefore, 
is also a synonym. 
Characters. — Cornicles present, distinct, truncate. Antennse of six segments, 
armed with oval sensoria and placed on more or less distinct tubercles. Fore wings 
with the media twice branched, the radial sector either absent or faintly indicated, 
sometimes, however, complete; hind wings with both media and cubitus present. 
Cauda distinctly knobbed, anal plate bilobed, body with prominent hairs. 
Forms living more or less solitary upon the foliage, sexes not markedly different from 
the other forms; oviparous female producing several eggs and possessing sensoria upon 
the antennse. 
Type (monotypical), Calaphis betulella Walsh. 
