112 The Philippine Journal of Science 1919 
Philippines. It is differentiated from that group, however, by 
the striking color with no dark markings, a larger number of 
scales on snout and supraocular region, and larger unkeeled 
temporals; the supranasals are larger and more clearly dif- 
ferentiated. Mr. McGregor, its discoverer and for whom I 
take pleasure in naming it, states that it is not rare on Batan 
Island. In a memorandum dated June 12, 1907, he says: 
Our party went to the summit of the mountain. On the return a 
large yellow snake was found resting at about 2 meters from the ground 
coiled on some leaves that had lodged among the thick stems of a kind 
of large grass. 
The snake was struck with an alpen-stock and fell to the ground. 
In attempting to put a string on its neck I was scratched by the fangs, 
between the last two joints of my thumb. Mr. H. G. Ferguson immediately 
made several cuts across the wound with a pocket knife and tied a string 
around the thumb. My hand and forearm were swollen by evening. 
The swelling subsided within a couple of days. There was very little 
pain, and no further trouble was experienced. 
LIZARDS 
Hemidactylus luzonensis Taylor. Plate I, fig. 2, b and e. 
Hemidactylus luzonensis TAYLOR, Philip. Journ. Sci., Sec. D (1915), 
10, 93. - 
This species was first described from a single mutilated female 
specimen. I have since examined several other specimens of 
this rare lizard. Four were presented to me by Dr. Edward 
S. Ruth, of the University of the Philippines. Several other 
specimens have been collected for the Bureau of Science col- 
lection. 
Description of species.—( Adult male, No. 1620, E. H. Taylor 
collection; collected at Manila in 1916, by Edward S. Ruth.) 
Head flattened; snout rather oviform, more than twice as wide 
as deep, elongate, little less than twice the diameter of eye, one 
and one-half times the distance of eye from auricular opening; 
latter distinctly oblique on one side, rather vertical on the other; 
rostral squarish, upright, with a median notch and a cleft nearly 
half the depth of the scale; nostril pierced between rostral, 
first labial, two postnasals, and a supranasal; supranasals sepa- 
rated by two scales; ten upper labials, the last two very small; 
nine lower labials; mental triangular followed by two pairs of 
chin shields, first pair touching one labial and forming a long 
median suture; second pair in contact with first pair and two 
labials, but separated from each other by three scales; scales 
* Compared with Stejneger’s description of a Formosan specimen. 
