The endemic diseases of the southern states . Fig. 7.—Anopheles pupa. Magnified. 54 ENDEMIC DISEASES OF THE SOUTHERN STATES ova after desiccation for two or three days, but Grassi* is saidto have hatched them after keeping them dry for twelve Larva.—The head of the anopheles larva is more or lessglobular; the eyes are situated laterally at the broadest part ofthe head. The antennas are rod-shaped and unjointed; at theend are two leaflets, between which arises a branched mouth parts consist of the feeding brushes or whorl-organs, -?^^^ate;. Fig. 8.—Head of anopheles. Magnified
The endemic diseases of the southern states . Fig. 7.—Anopheles pupa. Magnified. 54 ENDEMIC DISEASES OF THE SOUTHERN STATES ova after desiccation for two or three days, but Grassi* is saidto have hatched them after keeping them dry for twelve Larva.—The head of the anopheles larva is more or lessglobular; the eyes are situated laterally at the broadest part ofthe head. The antennas are rod-shaped and unjointed; at theend are two leaflets, between which arises a branched mouth parts consist of the feeding brushes or whorl-organs, -?^^^ate;. Fig. 8.—Head of anopheles. Magnified. the maxillary palps, the mandibles, the under lip, and theclypeus. The neck is very narrow in the full-grown larva. In the young larva the thorax is little, if any, wider than thehead, but in older specimens it is much wider. There are nine post-thoracic segments. The first three seg-ments bear branched lateral hairs. The third to the seventhsegments have upon the dorsum a pair of fan-shaped structures,known as the palmate hairs. The eighth segment contains the two openings of the respira-tory system, which ends abruptly at the dorsum of this segment MALARIA 55 without the prolonged breathing tube of the other ninth or caudal segment bears four flaps containing re-spiratory branchiae. This segment is armed with two largetufts of hair
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Keywords: ., boo, bookcentury1900, bookdecade1910, booksubjectdiseaseoutbreaks
