In the first part of this paper fifteen species were described, eight of which were from birds. In the present part an additional fifteen are dealt with.

The recent note by Shipley (Parasitology, vi. 351–352) on the passage of a slug, Limax marginatus Müll., through the human digestive tract prompts me to place on record a similar case which came under my notice last summer.

My studies on the distribution of filariasis in the Fiji Islands demonstrated the intimate relationship between the elephantiasis rate of a district and the microfilaria rate of the inhabitants, an observation in agreement with the previous work of Low and Daniels on the same subject. In Ceylon I resolved to again investigate this subject in order to ascertain whether in this island also a similar result could be obtained.

For the purpose of present study, Ceylon may be regarded as presenting two definite climatic zones—the hot low plains and the damp cool tea-bearing area of the central provinces, a district lying between the isothermal lines of 70–75° F. (vide map 1); these two zones are probably the main factors in influencing the distribution of malaria in the island.

Fleas are insects that undergo a complete metamorphosis in the course of their development from egg to adult. The eggs laid by the mother are not, as are the eggs of lice, attached in any way to the skin, fur or feathers of the animal on which the parents are parasitic. They fall into the nest, or drop to the ground within the lair or “ run ” of the host. Hatching takes from three to ten days according to the temperature. The larvae are active, whitish maggots, eyeless and legless, which are not parasitic, but feed on organic matter in the host's bed, or in the dust that collects on the ground in its proximity.

During investigations at the Bussey Institution on the rôle played by certain dipterous larvae in experimentally induced myiasis, with the object if possible of clearing a little of the doubt with which so much of the question is shrouded, the need of good diagnostic characters for these larvae was brought forcibly to my attention.

This investigation was commenced by one of us (J. A. I.) in 1910 and carried on for three and a half years. Our purpose was to determine as accurately as possible the percentage of appendices operated on for appendicitis which contained intestinal parasites. The results of a study of 100 unselected cases are given below.