136 NINETEENTH REPORT STATE ENTOMOLOGIST OF MINNESOTA—IQ22 
75. Genus MELANOCALLIS gen. nov. (The black beauty): 
Type: Callipterus caryaefoliae Davis, 1910. This very interesting form 
is found on the leaves of hickory. They are found as minute black 
specks along the veins and have considerable leaping ability. The body 
is provided with many spinelike tubecles on various parts: 
(79) MELANOCALLIS CARYAEFOLIAE (Davis) 
Found on the underside of the leaves of Carya. 
76. Subtribe CALLIPTERII. (Tilia-Quercus group.) The sub- 
tribe indicates the maximum of Callipterini development. The North 
American continent seems to be their center of distribution as at- 
tested by the large number of species found in comparison with other 
parts of the world. The group has a wide habitat on forest trees, 
besides Tilia and Quercus they are also found on Alnus, Corylus, 
Castania, etc. _The following genera are found in Minnesota: 
a. On Tilia. Base of terminal antennal segment elongated..................- 
Genus CALLIPTERUS 77 
bo (On Alnus.) Base noteloneatedepas acts ene Genus PTEROCALLIS 78 
c. On Corylus and Quercus. Stigmal vein often indistinct................... 
Genus MYZOCALLIS 79 
d: On Quercus end Ulmus. Body with dorsal-tubercles/=3.22....-0.s meio 
Genus TUBERCULATUS 8o 
77. Genus CALLIPTERUS Koch, 1855. Type: Aphis tiliae Lin- 
naeus, 1758. Stigmal vein distinct; base of terminal antennal segment 
elongated, spur somewhat shorter. The genus Callipterus was estab- 
lished by Koch in 1855 based on all the species included without 
indicating any one as the type. Some years later Passerini broke up 
the genus, indicating several additional genera, and restricted Koch’s 
Callipterus to juglandis as type and placed with the Lachnini. Koch’s 
description of his Gaylous, very obviously does not apply to juglandis, 
but rather to the forms Passerini included in the genus Myzocallis. 
Later writers like Walker, Riley, Monell, Thomas, Buckton, and others, 
strongly protested the procedure of Passerini and attempted to restore ~ 
Callipterus to its original meaning as given by Koch. Callipterus 
Koch and Callipterus Passerini are two very different conceptions, as 
Passerini misinterpreted Koch. Walker first suggested that tilia be 
the type of Koch’s genus Callipterus and that Myzocallis be restricted 
to species on Corylus and Quercus. In place of Passerini’s Callipterus 
he proposed the term Callaphis, which Buckton later changed to Pty- 
chodes, a tem that was still later changed to Panaphis by Kirkaldy. 
It should be noticed that Koch arranged his species in a descending 
order, placing first the more typical forms, and ending with the lowest, 
