New mallophaga / by Vernon L. Kellogg.

  • Kellogg, Vernon L. (Vernon Lyman), 1867-1937.
Date:
1896-1899
Catalogue details

Licence: Public Domain Mark

Credit: New mallophaga / by Vernon L. Kellogg. Source: Wellcome Collection.

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    jcjunus to be a long delicate tube with expanded, turnip- like, posterior extremity. The “ wing-muscles ” are greatly reduced. There are but four openings for the ingress of -the blood, which is not rich in white corpuscles. Wedl was able to study the heart of Menopon pallidum, but Grosse could not succeed in making preparations showing the heart of Tetraopthalmus chilensis \= Menopon titan\. Respiratory System (fig. 6, plate ii). In Menopon titan I have found six pairs of abdominal spiracles (segments 3-8) and a pair of prothoracic spiracles. There are two large longitudinal trunks and one large transversal trunk (segment 4 of the abdomen) in titan. Nervous System (fig. 3, plate ii). There are two head ganglia, the supra-oesophageal and the infra-oesophageal, and three thoracic ganglia lying close together. There are no abdominal ganglia, the hindmost thoracic ganglion sending back into the abdomen two large nerves, wrhose branches provide the abdominal viscera with nerves. Life-History and Habits. The Mallophaga have an incomplete metamorphosis. The eggs are elongate-oval, are fastened singly by some gluey substance to the vanes or barbs of the feathers, and the young issue by breaking off a circular cap or lid at the larger free end of the egg. The duration of the egg stage has not been determined for any species. A num- ber of eggs of Nitzschia pulicare (host, the Chimney Swift, Chcetura pelasgia), collected by P. H. Rolfs (Ames, Iowa), and kept, some of them, “in a tight paste- board box in his vest-pocket, the others enclosed in cot- ton-plugged tubes under a setting hen,” incubated under these circumstances in from 13 to 20 days. The age of the eggs at time of collecting was not known. The young