85 
received no less than seven Latin names showing its description that 
many times as a supposedly new species. 
A careful perusal of the notebooks of this office as well as of litera- 
ture go to show that this maggot is considerably more destructive to 
beans than to corn, and as many of our Divisional notes have not been 
recorded they ma} T be mentioned here in connection with reports of 
injury. 
DESCRIPTIVE. 
The parent fly of this maggot looks to the casual observer much like 
a small house fly. It can best be identified by the male (iig. 19, a). 
The principal characteristics of the male consist in a row of short, 
rigid, bristly hairs of nearly equal length on the inner side of the 
posterior tibia? or shanks. The female can scarcely be distinguished 
Fig. 19. — Phorbia fusciceps: a, male fly, dorsal view; b, female, lateral view; c, head of female, from 
above; cl, larva, from side; e, anal segment of larva; /, anal spiracles; g, thoracic spiracles; h, 
puparium— all much enlarged (original). ■ 
from those of related species, such as the adults of the cabbage root 
maggot and onion maggot. The length of the bod}^ is about one-fifth 
inch (5 mm ) and the wing expanse about two-fifths (9.5 mm ). 
The larvse also resemble the species mentioned. Like other mag- 
gots, they are footless and of cylindrical form. As will be seen by 
illustration 19, <:/, which represents a larva in profile, they are narrowed 
at the anterior extremity and enlarged posteriorly. They are, however, 
considerably smaller than the onion maggot, measuring about one- 
fourth of an inch (6 mm ) in length and about one-sixth as wide at the 
thickest portion. Alcoholic specimens are very pale yellow in color, 
and the chitinous or harder parts at the ends are usually considerably 
darker. The anal segment is shown at e\ f represents the anal 
spiracles, and g the thoracic ones. There appear to be only 6 or 7 
divisions in the cephalic spiracles, whereas in the onion-feeding species 
there are usually 11 or 12 such divisions. 
