LIBRARY

794 COLLEGE ENTOMOLOGY
305-6, 1941.) It is now cosmopolitan in distribution. The European species
of this genus are divided into seven subgenera. The eggs are very minute,
oblong, with reticulated surface and two appendages as long as the egg. The
maggots are whitish or dusky and 7 mm. long. The pupre have two horn-like
respiratory tubes.
Family AGROMYZIDlE 1 Bigelow 1852 (Ag'ro-myz'i-dre, from the Greek
o'!ypoS, a field, farm, + /-lIlLCl, a fly). German, Minieriliegen. Leaf Miners.
Minute to small flies, varying from 1.5-4.0 mm. long; usually blackish or
yellowish in color; with postocellar bristles and oral vibrissre; arista dorsal and
basal and bare or pubescent; femora bristled; wings hyaline or pictured. The
larva! are apparently all phytophagous, and many of them produce characteristic
serpentine or blotch mines, particularly on the leaves of broad-leaved evergreen
and deciduous shrubs and trees.
This family is a comparatively large one, is widely distributed, and contains
many species of economic importance. The most important genera are Agromyza
Fallen (about 100 described species are known which attack a large list
of wild and cultivated plants), Cerodonta Rondani, Dizygomyza Hendel, Liriomyza
Mik, Napomyza Haliday, and Phytomyza Fallen (a large genus with about
100 species listed on known host plants). The genera are not all clearly agreed
upon by the various workers in this family, so it is impossible to place all of the
species definitely.
Family CHLOROPIDlE 2 Rondani 1856 (Chlo-rop'i-dre, from the Greek
XAWPOS, greenish, +