. Bulletin. Insects; Insect pests; Entomology; Insects; Insect pests; Entomology. 38 MISCELLANEOUS RESULTS OF WORK OF BUREAU IX. Practically nothing is known of the life history of any species of the genus, of which there are quite a number. The beetles are par- tial to Astragalus and Aragallus and feed also on lupines and related plants. The larvae are undoubtedly root or stalk feeders. The pres- ent species in the larval stage affects the roots and transforms in the ground in comparatively large earthen cocoons, such as are show^n in the illustration (fig. 11).. Fig. 11.—Four-lined loco weev
. Bulletin. Insects; Insect pests; Entomology; Insects; Insect pests; Entomology. 38 MISCELLANEOUS RESULTS OF WORK OF BUREAU IX. Practically nothing is known of the life history of any species of the genus, of which there are quite a number. The beetles are par- tial to Astragalus and Aragallus and feed also on lupines and related plants. The larvae are undoubtedly root or stalk feeders. The pres- ent species in the larval stage affects the roots and transforms in the ground in comparatively large earthen cocoons, such as are show^n in the illustration (fig. 11).. Fig. 11.—Four-lined loco weevil (Cleonus qnadi Uineaius\ : Cocoon. (Original.) THE YELLOW LOCO FLY. (Tritoxa incurva Loew.) This species was collected at Hugo, Colo., on Aragallus lamherti. It is a two-winged fly of the family Ortalidse and is recorded as having the same habits as the black onion fly {Tritoxa fexa AVied.), w^hose larva or maggot lives in the bulbs of onions; indeed, it was at one time considered a color variety of the latter. The wing markings are almost identical, but the face, thorax, and most of the abdomen are brownish yellow, wdiereas in the onion fly these parts are black. Its body is about one-third of an inch long, each wing having a little shorter measurement. Neither species under consideration is, as a rule, especially abundant, but both are capable of being very destruc- tive to plant life when they multiply in numbers, as may happen any year in some localities. THE SPOTTED ROOT ELY. (Euxesta notata Wied.) This pretty little fly of omnivorous habits was reared from Asfj'a- galvs mollissimiis from Hugo, Colo., in June and July, 1005, being associated with the fickle midge and the loco root-maggot. In its. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original United States. Bureau of Entomology. Washington : G. P.
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