SYNOPTICAL KEY TO THE APHIDIDAE OF MINNESOTA 149 
127. Genus COLOPHA Monell, 1877. Type: Byrsocrypta ulmi- 
cola Fitch, 1859. Media typically with one branch, but often simple; 
hind wings with one transverse vein; galls are formed on leaves of 
Ulmus, summer generations underground on roots: 
(132) COLOPHA ULMICOLA (Fitch) Monell, 1877 
The well known Cockscomb gall on American elm; summer 
generations are found on roots of grasses. 
128. Genus MELAPHIS Walsh, 1867. Type: Byrsocrypta rhots 
Fitch, 1866. Media usually simple, but often with one branch; hind 
wings with two transverse veins. 
(133) MELAPHIS RHOIS (Fitch) Walsh, 1867 
Found in rather large thin walled galls on Rhus. 
(134) MELAPHIS ULMIFUSUS (Walsh) 
Found in large sacklike galls on Red elm or Ulmus fulva. 
129. Supertribe PEMPHIGEA. Sensoria transverse or oval, not 
annulate, and usually not extending around the segment ; the transverse 
veins of the hind wings usually arising close together and with the 
bent radius have a tridentate appearance ; cornicles wanting ; wax glands 
composed of small and irregularly placed facets: 
a. Migrant with 6-jointed antennae; fundatrix with five segments; wax 
glands present on the head as well as on the rest of the body; found 
iilehwWaStedeleaveSuOr since ania. cuustok beck see Tribe PROCIPHILINI 130 
b. Migrant with 6-jointed antennae: fundatrix with only four segments; 
wax glands not present on the head; spring generations found in true 
CBINIS "ghar as Sot Pith PS Gh eT ORE a ae ie, oe Tribe PEMPHIGINI 133 
c. Migrant with three to five segments to the antennae; fundatrix with four 
segments ; hind wings with one or two transverse veins; the cubital vein 
appearine-as a branch of the anal........... Tribe HORMAPHIDINI 136 
130. Tribe PROCIPHILINI. Large forms with large wax glands 
on the head as well as on the abdomen; usually found exposed or in 
crumpled leaves; the following genera are known from Minnesota: 
a. Found in twisted leaves or free; sensoria transverse..............+++20% 
Genus PROCIPHILUS 131 
br Having free on their host plant: sensoria’ oval<:./e.>..%.0..c. be wens 
Genus NEOPROCIPHILUS 132 
131. Genus PROCIPHILUS Koch, 1857. Type: Aphis bumeliae 
Schrank, 1801. Antennae rather long for a Pemphiginae, basal part 
of the terminal segment elongated. Found in twisted leaves on ash 
and alder. 
(135) PROCIPHILUS FRAXINIFOLII (Riley) Pergandi, 1912 
Found in twisted leaves on ash. 
