A NEW OMOPHRON AND A NEW SIAGONA 
FROM THE PHILIPPINES 
(COLEOPTERA: CAR AB I DAE)* 
By P. J. Darlington, Jr. 
Museum of Comparative Zoology 
The following two new species from the Philippines constitute 
zoogeographically important range extensions of the carabid genera 
Omophron and Siagona. They are described now so that I can refer 
to them in discussion of the distribution of Carabidae in the Indo- 
Australian Archipelago in Part IV of my “Carabid Beetles of New 
Guinea.” 
Tribe omophronini 
Genus Omophron Latreille 
O?nophron is usually considered to be the only genus of its tribe. 
The insects are broadly oval, multistriate, often complexly marked 
carabids which inhabit sandy shores of rivers and lakes. They are 
usually nocturnal and stay hidden in closed burrows in the sand by 
day, but they may be routed out by water thrown over the sand in 
which they are hiding. 
Distribution of the genus. Africa and Madagascar, Europe and 
Asia to Japan, and North and northern Central America; but not 
South America and not the Australian Region. An old record for 
New Caledonia is considered an error (Banninger 1918, p. 109). In 
the Oriental Region, species are numerous from India to northern 
Indo-China, and a few occur south through the Indo-Chinese Penin- 
sula, but none is known from the Malay Peninsula and, until now, 
none has been found in the Indo-Australian Archipelago or the 
Philippines, so the present new species from Luzon considerably ex- 
tends the known range of the genus. 
Omophron luzonicus sp. nov. (Figs. 1,2) 
Types. Holotype <A (Museum of Comparative Zoology, Type 
No. 27,931) and 20 paratypes all from Central Plains of Luzon, 
Philippine Islands, Feb. — Sept. 1945, collected by myself. The en- 
tire type series was taken from sandy river banks and bars, chiefly 
along the Rio Pampanga. 
Description. Form and pattern as figured ; back of head and dis- 
cal areas of pronotum and elytra blackish green, with marginal pattern 
^Published with the aid of a grant from the Museum of Comparative 
Zoology. 
Manuscript received by the editor October 26, 1967 
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