. Bulletin. Insects; Insect pests; Entomology; Insects; Insect pests; Entomology. 10 SOME INSECTS INJURIOUS TO TRUCK CROPS. while in the corresponding position on the posterior margin there is a paler dusky spot two or three times as large. The head is yellow, and the eyes large and brilliant green with bluish reflections. The ovipositor varies from yellow to black. None of these colors is so bright in preserved specimens. The length of the body is about three-sixteenths of an inch (5 mm.), and the wdng expanse is seven- sixteenths of an inch (11 mm.). The larva, or maggot (fig. 1, h).—The lar
. Bulletin. Insects; Insect pests; Entomology; Insects; Insect pests; Entomology. 10 SOME INSECTS INJURIOUS TO TRUCK CROPS. while in the corresponding position on the posterior margin there is a paler dusky spot two or three times as large. The head is yellow, and the eyes large and brilliant green with bluish reflections. The ovipositor varies from yellow to black. None of these colors is so bright in preserved specimens. The length of the body is about three-sixteenths of an inch (5 mm.), and the wdng expanse is seven- sixteenths of an inch (11 mm.). The larva, or maggot (fig. 1, h).—The larva, or maggot, is of the usual form of the Trypetidse, measuring about five times as long as wide. It is nearly transparent, except in the interior portions, where it is yellowish. The contents of the abdominal cavity appear greenish through the skin. The length of the body is 7 mm. and the width mm. The anal segment of the larva as seen from the extreme end is illustrated at fig- ure 1, c. Tlie iiuparium,.— The larva when full grown contracts and hardens, forming a coarctate pupa or puparium (fig. l,d), serving the purpose of a cocoon in inclos- ing the true pupa. In the present spe- cies, as with others of tliis group which have been studied, the form is oval in outline, imperfectly cylindrical, and ta- The lower surface is somewhat The lenffth is. Fig. 1. The parsnip leaf-miner (Acidi'j/ra^r/a): a, Fly; 6, larva, lateral view; c, anal segments of same; d, puparium; e, cephalic extremity; /,analextremity; fir, row of cephalic spiracles; ?(., anal spiracles. a,b,d, Much enlarged, remainder more enlarged. (After Coquillett, except h, c, original.) pering almost equally at both ; flattened and attached to the leaf by a viscid secretion twice the width and the color i)ale green when first formed, changing to straw color with greater age. The body is composed of 11 strongly marked segments. The mouth-parts are retracted within the pupal skin, and the cephalic or
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