1931] Camponotus ( Myrmepomis ) sericeiventris 97 
seen from behind broadly rounded and entire. Appressed 
pubescence dull ochraceous, slightly brighter on the gaster 
than in cualatensis, very short and feebly developed on 
the vertex, long and more conspicuous on the middle of 
the pronotum, shorter on the dorsum of the mesonotum, 
absent on the pleurae and coxse, very short on the posterior 
surface of the petiole. Hairs short, especially on the gaster 
where they are mostly orange yellow; on the head and 
thorax with black bases and orange tips. 
Workers major, media and minor. Length 8-12 mm. 
Like the maxima, but head smaller and without shining 
sides, gula and clypeus; in the smaller individuals with 
nearly straight posterior border. Pronotal spines very ob- 
tuse as in the maxima; meso- and epinotum more strongly 
compressed above. Hairs similar but less abundant on the 
head and thorax. 
Described from numerous specimens which I took Dec. 
14, 1911, from a flourishing colony nesting in the decayed 
wood of a large Celtis tree in the very arid country around 
Zacapa, Guatemala. There are also specimens in the Mu- 
seum of Comparative Zoology from Portilla Grande, Hon- 
duras (R. E. Stadelmann). 
Var. quiriguensis var. nov. 
Worker maxima. Length 12-13 mm.; head 4.5 x 4.5 mm.; 
hind tibia 5 mm. 
Smaller than the preceding variety, but the head very 
similar, black with somewhat less shining sides. Pronotal 
spines and petiolar node similar. Appressed pubescence on 
the gaster dense and brilliant golden as in the typical rex, 
but almost absent on the head and thorax, there being only 
some short dilute ochraceous pubescence on the vertex and 
dorsum of the pronotum. Hairs similar, but less abundant 
on the head and thorax and somewhat longer on the gaster, 
though not as long as in rex. 
