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Leptodactylime

examples, whitish, surface, line and band

LEPTODACTYLIME.

Leptodartylus albilabris (Ginther). Figure 1.

Ten from the junction of the Arecibo and Tanama Rivers, Porto Rico, on June 9, 1915. As considerable variation in color is noticeable, 5 examples have been selected as an illustration of the dorsal aspect. Two adults show a strongly contrasted color-pattern above, largely of longitudinal bands, of which the median or vertebral is whitish, edged on each side by a blackish band of variable width in places; these blackish bands largely alike. Some times a whitish vertebral band gives off a branch on each side in the front interorbital region, which extends over eyelid. Blackish band on each side of snout, including nostril, to eye, then continued behind to embrace tym panum to shoulder, present in all examples. Side of each lip dusky. Several blackish spots on groin and a few obsolete dusky markings along the side. Upper surface of hind limbs strongly contrasted with blackish crossbars. Other examples show lengthwise bands on back obscure, or as irregular blotches, and along the sides as broken small spots. They often form two large A-shaped obscure blotches on back before pelvis. Two dark lateral bands may unite in hind interorbital region to form a connecting dark bar. Some examples have the throat dusted with pale dusky, though in most the entire under surface is uniform whitish.

One metamorphosing example and several tadpoles from Utuado; a small example from the Virgin Islands. The Porto Rican examples were obtained along small streams flowing into the Arecibo River about 5 kilometers south of Arecibo, where the lowlands merge into the hills. Active during day-time.

Collected 21 examples from the junction of the Arecibo and Tanama Rivers on June 9. This little amphibian is extremely variable in color. Some individuals are pale or very light, others dark, and some of all ages with a narrow whitish vertebral line. Four extremes of color-variation are represented in the accompanying figures of the dorsal surface.

pi All the examples with the narrow whitish vertebral line (4 individuals) show it bifurcate and extending out on each side of the hind femoral surface toward the under surface of the knee. The larger of these examples are_also irregularly spotted or blotched with whitish on the back, about the inter orbital region, and at each heel. A few spots may also occur elsewhere on the

upper surfaces of the tibial regions. The smaller examples have large obscure blotches of slightly darker shade than the general color of the upper surface, which tend to form obscure bars across the tibial and femoral regions. The lower body-surface is similarly variable, from slightly soiled brownish to more or less completely marbled with smutty, in which case there is also a median obscure pale line from the chin to the sternum, with line given off each side to the axillaries.

Four pale examples are also quite variable. One has the front and hind surfaces of the femoral region with rather large dusky vermiculations strongly contrasted with whitish. In this individual there is also a dark-gray inter orbital band. Another shows a number of whitish spots on the middle of the back with broad whitish band back from each eye to groin. The lower sur face of the body is often uniform whitish.

Large darker olive or brownish examples are more or less uniform in color, though one shows pale areas back from the eye to the groin. They usually have the right and front femoral regions and groin finely speckled brownish on pale ground-color. Most are more or less smutty below.

In a number of small darker examples traces of the light areas back from the eye are seen in two cases and in one of these an accessory short inner line backward and parallel is also present, while the larger bands tend to converge at the middle of the back. All have the limbs above with more or less obso lete dark cross-bars. A dark interorbital band is also usually in evidence.

All examples have the dark line from the eye over the tympanum distinct.

species appears to be less variable than many of this genus. Although Cope states that the body "is without granulations above, below, or upon the sides, " all my examples show them on the lower hind femoral region. As Meerwarth's figure lacks detail I have made the following note. In this species the color pattern is largely constant. Sometimes the blotches or vermiculations are jarger and fewer on the back anteriorly, or they may vary in being finer and more numerous, though the general appearance is similar.