. Bulletin. Insects; Insect pests; Entomology; Insects; Insect pests; Entomology. SOME INSECTS INJURIOUS TO TRUCK CROPS. The larva (fig white in Fig. simplex: a, larva, lateral view; 6, thoracic spiracles; c, anal spiracles; d, puparium from side; e, same from above; /, section of asparagus stalk, showing injury and location of puparia on detached sec- tion; o-f, much enlarged; /, slightly reduced (original). 2, a) is about one-fifth of an inch long and milk- Like other maggots, it is footless, large at the posterior extremity, and tapering toward the head. The puparium (f
. Bulletin. Insects; Insect pests; Entomology; Insects; Insect pests; Entomology. SOME INSECTS INJURIOUS TO TRUCK CROPS. The larva (fig white in Fig. simplex: a, larva, lateral view; 6, thoracic spiracles; c, anal spiracles; d, puparium from side; e, same from above; /, section of asparagus stalk, showing injury and location of puparia on detached sec- tion; o-f, much enlarged; /, slightly reduced (original). 2, a) is about one-fifth of an inch long and milk- Like other maggots, it is footless, large at the posterior extremity, and tapering toward the head. The puparium (fig. 2, <^, e) is not unlike the "flaxseed" of the perni- cious Hessian fl3^ with Avhich it has been aptly compared. At a little dis- tance, also, it suggests a Lecanium scale. This stage is remarkable be- cause of its peculiar flattened and curved position, as seen from the side. It is red in color, and meas- ures about mm. in length and about 1 mm. in width. The egg has not been observed. This species belongs to the dipter- ous family Agromyzidas, and was described by Loew in 1869," the locality being given as "Middle ; DISTRIBUTION. In its injurious occurrences this species appears to be limited to the eastern United States, from New England to Tennessee. From avail- able data it is quite obvious, however, that it may be destructive over a considerable territory, including a large portion of Massachusetts and Connecticut, Long Island, the District of Columbia, Pennsylvania, and Tennessee. As it is recorded from New Jersey, it is probably injurious there, although no reports of injury in that State have reached this ofiice. In time it will doubtless attract attention in inter- mediate points and in States farther north and west. It has also appeared in asparagus beds in California. HISTORICAL AND BIOLOGICAL NOTES. In May, 1897, and afterwards this fly was observed in abundance by the writer on terminal shoots of asparagus, particularly at
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