Distribution. Widespread in north from Wisconsin 
to New York, most southerly record Virginia; 
Canada. 
References. Greene, 1917: 313 ( Agromyza as aceris ) ; 
Frick, 1957b: 202 (synonymy of aceris Greene with 
P. setosa ) ; Spencer, 1969a: 107. 
5 orbital bristles, only upper reclinate, others 
incurved P . amelanchieris (Greene) 
Synopsis. Closely resembling P. setosa but smaller, 
wing length 3-4.3 mm; orbital bristles more 
slender; lunule smaller; epistoma more pronounced, 
approaching form present in P. betulivora (see fig. 
473); male genitalia with aedeagus having long 
paired tubules (fig. 487). 
Host/Early Stages. Amelanchier canadensis . Larva 
boring in cambium of trunk down to roots, leaving 
"threadlike reddish line in cambium"; larvae full 
grown in West Virginia in April, in Great Smoky 
Mts., Tennessee, North Carolina in July; puparium 
pale yellow, posterior spiracles slightly more 
slender than in P. setosa , each with 3 bulbs (fig. 
488, A, B). 
Distribution. Massachusetts, Michigan, North 
Carolina, Tennessee, Washington, West Virginia 
(Frick, 1959); widespread in Canada. 
References. Greene, 1917: 316 (biology); Frick, 
1959: 375; Spencer, 1969a: 102. 
Genus Amauromyza Hendel 
Dizygomyza ( Amauromyza ) Hendel, 1931: 
39. Type of subgenus (now genus): 
Agromyza lamii Kaltenbach, 1858 
(Europe) (see part 2, p. 272). 
Amauromyza Nowakowski, 1962: 97. 
Sub genera: 
Cephalomyza Hendel, 1931: 32. Type of 
subgenus: Dizygomyza luteiceps 
Hendel, 1920 (Europe). 
Catalpomyza Spencer, 1977c: 242. 
Type of subgenus: Agromyza pleuralis 
Malloch, 1914b (USA). 
Annimyzella Spencer, 1981: 144. Type 
of subgenus: Agromyza maculosa 
Malloch, 1913a (USA). 
Hendel* s concept of this genus 
(originally as a subgenus) was based 
primarily on the halter being black. 
However, in many species with the 
halter white or yellow, such as 
Amauromyza auriceps (fig. 518), the 
male genitalia are of the same 
distinctive form as in black species, 
such as A. abnormal is (fig. 489), and 
in all species the sperm pump has a 
characteristically enlarged, bowl- 
shaped base (figs. 502, 509). With 
this expanded concept, over 40 species 
are known throughout the world; 16 
species have been recorded in Europe 
and 2 have reached Australia (Spencer, 
1977d). Twenty species are recorded 
in the United States. Two others are 
known in Alberta, Canada, one having 
been reared from Shepherdia 
(Elaeagnaceae) (Sehgal, 1971). 
Essential characters of the genus are 
costa extending to vein M 1+2, which 
ends nearest the wingtip; orbital 
setulae reclinate or inclined 
(never proclinate). Normally there is 
a strongly developed presutural dorso- 
central, but this may sometimes be 
weak or even lacking, as in Amauromyza 
pleuralis . 
78 
