1930 ] 
A Second Note on Gesomyrmex 
35 
A SECOND NOTE ON GESOMYRMEX 
By William Morton Wheeler 1 
On his recent return from a so j urn of several years in the 
Philippines, Dr. James W. Chapman generously gave me a 
considerable portion of a colony of Gesomyrmex which he 
had had under observation at his camp (alt. 1500 ft.) near 
Dumaguete. The specimens are of unusual interest because 
they comprise not only a complete series of the various 
worker forms and therefore confirm the conclusions re- 
corded in my former paper 2 on the identity of the genera 
Gesomyrmex and Dimorphomyrmex, but also the mother 
queen of the colony and an adult male. In the paper cited 
I endeavored to ascertain the characters of this sex from a 
young pupa of the Javan G. kalshoveni Wheeler, but exami- 
nation of the specimen from the Philippines proves that my 
inferences from pupal structure were inadequate. Compar- 
ison of Dr. Chapman’s queen with the female of G. luzonen- 
sis Wheeler shows that whereas both belong to the same 
species, the former represents an undescribed variety. 
Since the Luzon form is known only from a female speci- 
men I shall have to compare the workers of the new variety 
with those of the closely allied kalshoveni. 
Gesomyrmex luzonensis var. chapmani var. nov. 
Worker maxima . — Length 6.5-7 mm. 
Distinctly larger and more robust than the maxima of 
G. kalshoveni and of a deeper, more reddish yellow color, 
with a large spot on the ocellar region and the discal, or 
Contribution from the Entomological Laboratory of the Bussey 
Institution, Harvard University, No. 332. 
2 The Identity of the Ant Genera Gesomyrmex Mayr and Dimorpho- 
myrmex, Ernest Andre'. Psyche 36, 1929, pp. 1-12, 1 fig. 
