HERPETOLOGT OF PORTO RICO. 587 



a similiirly colored .spot on the occiput and cross-hais on the hind leg-s, 

 all the pale marks more or less plainly edged with dusk}-; the ground 

 color varies from dark to light grayish brown overlaid to a varying 

 degree with yellowish or reddish. This style is evidently only a 

 moditication of the one descril)ed above, the dark ground color haAing 

 encroacluKl upon the light flanks. Some of these specimens art* so 

 (hirk that the pattern can l)e made out only with ditticult}'. One of 

 the large adult specimens shows distinct traces of the dorso-hitei'al 

 pale semilunar marks. 



The next style, rt^presented ])y a few^ specimens onh, is very diflerent. 

 These are nearly uniform dark brownish gray with a very narrow, 

 sharjily defined pale line from tip of snout down the middle of the 

 back to the vent, where it ])if urcates and extends along the posterior 

 edge of each femur; another line, less pale, crosses this one on the 

 interorl^ital space. Several specimens combine the common pattern 

 as described above with this narrow median line. 



A single young specimen in the lot is light olive gra}" with a pale 

 longitudinal ])and on the middle line from snout to vent so broad as to 

 nearlv till the interorbital space; the post-femoral streak is faintly indi- 

 cated; the pale lines are indistinctly outlined with dusky and there 

 rare similar cross marks visible on the hind legs. 



A curious feature is also the varialiility in the coloration of the iris. 

 In the younger specimens it is ])rassy, more or less overlaid with 

 dusky. In the adults, however, it is golden with a vertical blackish 

 streak in the middle of the lower half. However, if the sides of the 

 face are much darker than the region above, the iris is also darker in 

 the lower half below the narrow horizontal pupil which, as indicated 

 above, forms the continuation of the canthal black line. 



That the coqui or tree toad in other localities assumes a coloration 

 closely agreeing with the surroundings is proven l)y several specimens 

 collected in the western part of the island. A large adult specimen 

 caught by Dr. Richmond near the summit of the pass between Adjuntas 

 and Ponce, was of a reddish lu'own ground color, closely resem- 

 bling the clay upon which it was found (U.S.N.M. No. 27280; L, S. 

 No. 9067). The four specimens, on the other hand, which we took 

 under stones in the white clay hills east of Ponce on April It), were 

 nearl}^ uniform pale clay colored, with no markings, not even a trace 

 of a pale dorso-lateral band. 



IlahUat. — The "coqui" is common all over Porto Rico, from sea 

 level to the top of the highest mountains; in fact we found it most 

 abundant in the excessively damp woods near the top of El Yunque. 

 It does not occur on Vieques, nor has it been found on Mona Island, 

 a distribution quite unexpected in view of the fact that the species also 

 occurs in Santo Domingo and eastern Cuba. 



Ilaljit.s. — Although by no means confined to living on or among the 



