1931 ] Camponotus (Myrmepomis) sericeiventris 91 
7. Pubescence on head, thorax and petiole bright golden 
yellow but much shorter than in typical rex 
var. semirex var. nov. 
Sides of thorax almost or quite devoid of pubescence . .8 
8. Pubescence dull, golden ochraceous present on vertex, 
pronotum and petiole var. zacapensis var. nov. 
Pubescence absent on head, thorax and petiole, on gaster 
golden ochraceous var. quiriguensis var. nov. 
Camponotus (Myrmepomis) sericeiventris Guerin 
Worker maxima . Length 15-16.5 mm.; head 5-5.7 mm. 
long; 4.5-5. 2 mm. wide; hind tibia 5.6 mm. 
Head with rather straight sides, without swollen cheeks ; 
subopaque except the sides and gular surface which are 
reddish and shining, but covered with minute punctures; 
antennal funiculi dark brown. Spines of pronotum rather 
sharp, longer than broad. Superior border of petiole sharp, 
entire and broadly rounded, angulate on the sides. Ap- 
pressed pubescence not very abundant and not completely 
concealing the integument on the head, meso — and epino- 
tum, petiole and sides of pronotum; denser on the gaster 
where it strongly converges at the posterior borders of the 
segments. Hairs rather long, black, often with white tips; 
posterior borders of gastric segments with whitish or yel- 
lowish hairs. 
Workers major, media and minor. Length 7-13 mm. 
Resembling the maxima, except in the smaller head and 
longer and more acute pronotal spines. 
Female. Length 17-19 mm.; hind tibia 5 mm.; fore wing 
17 mm. 
Head smaller and narrower than in the worker maxima, 
with narrower posterior corners and less convex sides, 
nearly as broad in front as behind. Color and sculpture 
similar, but in some specimens the anterior half as well as 
the sides is red. Pronotal spines reduced to two small teeth. 
