. Report of the State Entomologist of Connecticut for the year .. . F., and is vigorously active at 85 to 90 degreesF. This may explain the fewer eggs and shorter galleries noted late in theseason. From daily observations of oviposition during warm weather it wasfound that an average of + eggs were deposited per day. Occa-sionally no eggs were deposited for a day or more, and the maximum notedwas 14 in one day. The incubation period for the eggs does not vary greatly except underadverse weather conditions, and hatching occurs in surprisingly directsequence with the time at which the eg
. Report of the State Entomologist of Connecticut for the year .. . F., and is vigorously active at 85 to 90 degreesF. This may explain the fewer eggs and shorter galleries noted late in theseason. From daily observations of oviposition during warm weather it wasfound that an average of + eggs were deposited per day. Occa-sionally no eggs were deposited for a day or more, and the maximum notedwas 14 in one day. The incubation period for the eggs does not vary greatly except underadverse weather conditions, and hatching occurs in surprisingly directsequence with the time at which the eggs were deposited. From observa-tions of 507 deposited at known dates during August, the average lengthof the incubation period was found to be + .5 days. The maximumnoted was nine days and the minimum was three days. About 24 hours before the shell breaks open, the egg loses its shiningappearance and shrinks slightly. At this time, if the egg shell is carefullyopened, the tiny larva, completely formed, may be removed. The Smaller European Elm Bark Beetle 303. Figure 4. Smaller European ekn bark beetle: Center above, female, lateral view, about 23 times enlarged. A, left tibia, posterior aspect; B, left antenna, lateral aspect; both enlarged 76 times; C, head of male, lateral aspect, enlarged 23 times; D, larva; E, head capsule, dorsal aspect; F, caudal segments, ventraJ aspect; G, pupa, ventral aspect. 304 Connecticut Experiment Station Bulletin 434 Larval period. The larva is scolytoid in form, creamy white and 4 mm. in length when fully developed. A fold in the integument, straightacross the posterior half of the pronotum and terminating in a puckereddepression on each side, readily distinguishes this larva from Magdalissp., in which the fold is distinctly arcuate, and from H. rufipes larvae inwhich the characteristic fold and musculature are not readily very sparse pubescence on the venter of the thoracic segments is anadditional characteristic by wh
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectinsects, bookyear1901
