. Bulletin of the Department of Agriculture. Agriculture. MEDITERRANEAN FRUIT FLY IN HAWAII. 49 LIFE HISTORY AND DESCRIPTION. THE EGG. DESCRIPTION. The eggs (figs. 3-6) are glistening white, about mm. long, elongate elliptical, and often more convex on the dorsal side. DURATION OF EGG STAGE. Martelli gives the duration of the egg stages at Portici, Italy, as 2 days in August and from 4 to 5 days in October. Newman states that in Western Australia eggs hatch in from 2 to 4 days during summer and in from 14 to 19 days during winter. Mally, in South Africa, found the egg stage to be fr
. Bulletin of the Department of Agriculture. Agriculture. MEDITERRANEAN FRUIT FLY IN HAWAII. 49 LIFE HISTORY AND DESCRIPTION. THE EGG. DESCRIPTION. The eggs (figs. 3-6) are glistening white, about mm. long, elongate elliptical, and often more convex on the dorsal side. DURATION OF EGG STAGE. Martelli gives the duration of the egg stages at Portici, Italy, as 2 days in August and from 4 to 5 days in October. Newman states that in Western Australia eggs hatch in from 2 to 4 days during summer and in from 14 to 19 days during winter. Mally, in South Africa, found the egg stage to be from 2 to 4 days in midsummer. Other data have been published but give no additional information and, being unaccompanied by temperature records, may be omitted. Newman appears to be the only investigator who has made an effort to secure data for the winter period. In Honolulu, or littoral Hawaii in general, the length of the egg stage is very short, and agrees with the minimum periods indicated by writers in other countries. In Table XII are recorded data on observations on 4,066 eggs secured at Honolulu, which indicate that the largest number of eggs hatch in from 2 to 3 days after deposition during the hottest weather. At a mean temperature of 79° F., 208 eggs hatched in from 49 to 51 hours after dep osition, while 79 hatched in from 52 to 53 hours, and 3 in from 53 to 54 hours. At a mean temperature of ° F., 134 eggs hatched between 49 and 54 hours after deposition, although 12 eggs deposited at the same time did not hatch until from 66 to 72 hours later. At a mean of 71° F., 695 eggs hatched within 72 hours, while 3 hatched in from 120 to 144 hours, or about 6 days after deposition. At a mean of ° F., 437 eggs hatched in from 77 to 83 hours after deposition and 227 after a period of 83 to 91 hours had elapsed. At a mean of ° F., 81340°—18—Bull. 536 4. X8 Fig. 6.—Cross section of peach, showing egg cavity of the Mediterranean fruit fly with eggs. Drawi
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