264 ECONOMIC ENTOMOLOGY 



TRYPETIDiE (FRUIT FLIES) 



Common Genera (after Williston) : 



A. Bristle on each side of front with a terminal leaf-like appendage. — Ceralitis. 

 AA. Front without such bristles; wings with colored markings not reticulate; 

 scutellum not with six bristles; fourth longitudinal vein not conspicuously 

 curved forward at its extremity. 

 B. Distal portion of wings marked with two hyaline indentations. Sepa- 

 rated by a curved or arched brown projection from the brown oblique 

 cross-band; body short; abdomen as broad as thorax; antepenultimate 

 section of fourth vein curved. — Epochra. 

 BB. Wings not marked as in B. 



C. Coloring of body generally light, never black; cross-bands on 

 wings nearly transverse; cross-veins but little oblique. — Trypeta. 

 CC. Coloring of body black; wings with four very oblique black cross- 

 bands; cross- veins not approximated; scutellum with 4 bristles, 

 yellow. — Rhagoletis. 



Mediterranean Fruit Fly (Ceratitis capitata Wied.). — (Consult Circ. 

 160, U. S. Div. Entomology.) Probably a native of the East Indies. 

 The appearance of this destructive insect in Hawaii has alarmed the 

 fruit-growers of the Pacific coast, and quarantine restrictions have been 

 enforced. It already occurs in Africa, Europe and Asia, in Australia 

 and in Brazil, and attacks nearly all kinds of fruits. 



Adult. — An active fly about size of house-fly, ochre yellow color; 

 eyes reddish purple; a blackish blotch in centre of forehead where two 

 stout black bristles arise; thickened basal antennal joints yellow, 

 terminal segments black; dorsum of thorax convex, yellowish- white 

 marbled with shiny black blotches. Wings broad and semi-opaque 

 with extreme base blotched with ochreous or brownish yellow, the rest 

 of the basal area marked with black; beyond a broad, irregular, trans- 

 verse ochreous band blotched at extremity; another similar blotch 

 inside of costal vein. 



Abdomen oval, with fine scattered bristles on upper surface, and 

 two rather broad transverse silvery white bands on basal half. Num- 

 ber of broods depends on temperature and food supply. 



Eggs. — Glistening white eggs placed beneath skin of ripe fruit 

 by sharp extensile ovipositor. Eggs not all deposited at once. 



LarvcB. — ^Begin feeding at once on the pulp, when mature (2-3 

 weeks) they leave the fruit and enter the ground, changing to puparia. 



Pupa. — Duration 12-21 days. 



