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Show 410 MR. F. SMITH ON NEW SPECIES OF ICHNEUMONS. [May 1, The size differs a good deal, as well as the form of the bill, in some examples appears more flat and enlarged, in others more slender, differences, however, not to be expressed by measurements. Long alae. caudae. culm. tars. in. Ii. in. Ii. in. Ii. in. Ii. Ii. Ii. 3 5-3 7 2 7-2 11 6 -6\ 11| (black form). 3 4-3 6 2 9 5|-5f (black and white form). 3 1-3 2 2 7 5£-6 (rufous form). M. nigra has been found likewise on the Friendly and Society Islands; Dr. Graeffe, however, did not meet with this species on the Tonga Islands (vide Finsch, Journ. f. Orn. 1870, p. 119). 5. PTILINOPUS DUPETITTHOUARSI (Neboux) ; Finsch & Hartl. Ornith. Central-Polyn. p. 129. Old and young birds of this peculiar species; the latter show already the whitish sincipital mark so characteristic of this species. Bill horn-green ; eye-ring bright red; feet pale red. 6. PTILINOPUS MERCIERI (Des Murs); Finsch & Hartl. Ornith. Central-Polyn. p. 128. Two specimens. This very rare fruit-pigeon, which I have now had the pleasure of examining for the first time, is a very remarkable species, distinguished at once by the extent of dark purple red on the head, which occupies not only the forehead and vertex, but also the lores, extending thence in a large patch to the base of the lower mandible. From above the eye the red cap is surrounded by a broad circle of bright yellow; the chin and throat are yellowish; breast and remaining under surface, inclusive of the lower tail-coverts, of a uniform dark yellow. Bill horn-green ; eye-ring red ; feet dirty purplish. Long. ala3. caudae. culm. tars. in. lin. in. lin. lin. 5 1 3 5 10 It is very interesting to find in one and the same group of islands two such very different species of Ptilinopus. 4. Descriptions of four new Species of Ichneumonidse in the Collection of the British Museum. By FREDERICK SMITH. [Eeceived April 13, 1877.] (Plate XLIV.) Of the Ichneumons which I now describe three are probably the most remarkable species to be found in the entire family. Two of them I cannot assign to any genus yet established; a new one has |