. Bulletin. Insects; Insect pests; Entomology; Insects; Insect pests; Entomology. 23 of their luMieticiiU iittack upon egjis it niav )»e tliat our caoo con- wore not .suit!il)le for aj^jfressive work of this inito. The numbers to he found were very assuring and this mite nuist ])e recog- nized as an important (Miemy to grasshoppers. 'rh«> lar\ie of a speeies of Carabid l)eetN\ which we were unabh:" to. Fig. 7.— Tioinbidiuin lucustanmi : <i. mature larva whuii about to loave the wing of a locust; b, pupa; 0, male artult when just from tlie pupa; rf, female—the natural s
. Bulletin. Insects; Insect pests; Entomology; Insects; Insect pests; Entomology. 23 of their luMieticiiU iittack upon egjis it niav )»e tliat our caoo con- wore not .suit!il)le for aj^jfressive work of this inito. The numbers to he found were very assuring and this mite nuist ])e recog- nized as an important (Miemy to grasshoppers. 'rh«> lar\ie of a speeies of Carabid l)eetN\ which we were unabh:" to. Fig. 7.— Tioinbidiuin lucustanmi : <i. mature larva whuii about to loave the wing of a locust; b, pupa; 0, male artult when just from tlie pupa; rf, female—the natural size indicated to the right; e, palpal claw and thumb; /, pedal claws; r/, one of the barbed hairs; A, the striations cm the larval skin (from Riley). rear to the adult condition, were also found to be an energetic feeder upon eggs. With their large mandibles they were observed breaking the egg sacs and devouring the contents. During April, May, and June the ash and black colored blister beetle {Jfacrohax/.s mi!color) (see tig. 8) showed by its numbers and the manner of the attack of the young to be an important enemy of grasshopper eggs. In sweeping they were a common capture, and in following the plows and cultivators the pseudo pupa' (coarctate) were seen in great numbers. The young of the tirst and second stages were also found among the egg-pods. Of the true parasitic forms two species were bred, Scelio hyalinipe)in!s Ashm. and Scelio <£di2)odce Ashm. While the former species appeared earlier than the latter, both continued to emerge as adults irregularl}' from May 1 until the latter part of June. They were found to come in the majority of cases from the eggs of the lower end of the pod, and in a few instances this was found the case even where grasshoppers were coming from the upper ends. As a rule not all of the eggs of the pods are parasitized, and the inference is that the habit of the parasites to attack the deeper placed eggs is to so retard the development
Size: 2541px × 983px
Photo credit: © Library Book Collection / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1800, booksubjectentomology, booksubjectinsects, booky
