. The butterflies of North America; second series [microform]. Butterflies; Butterflies; Lepidoptera; Papillons; Papillons; Lépidoptères. 14 LYC^NA II., III. with dissections. I had asked Dr. Hunt wlictlier there were special ;( bo- noatli the membrane of 11, and an opening at the top of tlie vesicle. Neitlier gland nor orifice was discovered. The fluid appeared to exude through minute pores all over the membrane. Nor was there any connection between the tubes of 12 and this organ of 11.* Br. Aug. Weismann wrote: " You should try and observe what enemies the larva) have. It is co
. The butterflies of North America; second series [microform]. Butterflies; Butterflies; Lepidoptera; Papillons; Papillons; Lépidoptères. 14 LYC^NA II., III. with dissections. I had asked Dr. Hunt wlictlier there were special ;( bo- noatli the membrane of 11, and an opening at the top of tlie vesicle. Neitlier gland nor orifice was discovered. The fluid appeared to exude through minute pores all over the membrane. Nor was there any connection between the tubes of 12 and this organ of 11.* Br. Aug. Weismann wrote: " You should try and observe what enemies the larva) have. It is conceivable that there are such enemies as are afraid of ; I have found three species of jiarasites about larvir. One is dipterous, a Ta- china fly. Thi;-! deposits eggs on the skin of the larva in second larval stage, and on tlie second or third seguient. As the grubs hatch, they eat their way through the skin, and emerge when full grown in the last larval stage, and make for them- selves a hard pupa case, out of which in a few days comes u lly. Two others ai'e hymenoptcrous and minute. One is identified by ; Riley as Apanteles congrefjatus Say. Tiie eggs of these species are deposited singly within the very young larva?, and the grub eats its way out when the larva is but half grown, and proceeds to spin for itself a cylindrical cocoon of yellow silk, from which in a few days the perfect insect will break forth. The fourth parasite is also hymenopte- rous, an Ichneumon fly, a species of Anomalon, as Mr. E. T. Oresson tells me. This appears to sting the larva only in the last or perhaps the last two stages. Tlie destruction of larva; by these and other parasites is inmiense. If any of thein attack the mature larva, as the Anomalon does, the grub will into the chrysalis and destroy that, and multitudes of chrysalids of different species of butterfly do so perish. But our Lyca^ia appears to I)e singularly free from para- sites in tile pupa stage,
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