457 
and largely replaces Macrosiphum rosae in the lowlands of the 
Islands. I have found it on roses in Honolulu and on Tantalus, 
Oahu, and at Wailuku, Maui, and also collected it on rose- 
bushes at Whittier, California, in 1912. 
25. Aulacorthum circumflexum (Buckton). 
Circumflexrum was discovered by Mr. Fullaway on poha 
(Physalis peruviana L.) on Tantalus, Oahu, and I have since 
taken it on one of the native shrubby violets (Viola sp.) in the 
Punaluu Mountains, Oahu, and on Phyllostegia grandiflora 
Benth. on Mt. Kaala, Oahu, at about 3000 feet. It has also been 
taken on pansies (Viola tricolor L.) in Honolulu by Mr. Full- 
away. 
Van der Goot makes this species the type of his genus Neo- 
myzus, but it seems to me to agree in every respect with Aula- 
corthum, as the apterous females examined by me have one or 
two small sensoria on the third antennal joint. 
26. Aulacorthum sp. 
In 1918, Mr. Fullaway collected, on an unidentified com- 
posite on Maui, a green Aulacorthum without dark markings, 
which agrees almost exactly with circumflexum in structural 
details and in the color of the legs, cornicles and antennae. In 
March, 1920, he took what is apparently the same species on 
ferns at Kilauea, Hawaii. 
27. Aulacorthum sp. 
A small colony consisting entirely of apterous females was 
collected on a fern (Polypodium sp.) in the native forest on the 
Pauoa trail, Tantalus, Oahu, in February, 1916. The species 1s 
green, with the cornicles, antennae, excepting the first two 
joints and base of the third joint, the apex of the tibiae and 
the tarsi blackish. The frontal tubercles appear to be somewhat 
shorter than is usual for the genus, but they are gibbous on the 
inner side, the third antennal joint bears one or two sensoria 
near the base, and the cornicles are slightly tapering and trans- 
versely: imbricated and imperfectly reticulated at apex. The 
identification of the species must rest until the alate form is 
discovered. 
