140 
William Morton Wheeler 
seen the two types of C. igneus , which were in the Menge Collection, 
I believe that my study of the types of C. mengei, together with the 
foregoing considerations, gives ample ground for regarding the two 
species as synonymous. 
Of the species as thus defined to include also C. igneus , Mayr shaw 
12 specimens, and the same number was seen by Ern. Andre. The 
105 specimens which I have seen, are distributed as follows: 86 workers 
and 2 males in the Geolog. Inst. Koenigsberg Coli. (B 19756, XXB 201, 
B 19322, XXB 1592, B 5459, B 18996, B 11729, B 19673, IB 355, 
B 18373, B 5215, XXB 2098, XXB 1327, B 14149, B5921, B 5204, 
B 19021, B 18376, B 11724, XXB 521, XXB 1686, B 1324, B 19088, 
XXB 1555 etc.), 16 workers in the Klebs Coli. (K 5633, K 5585, 
K 4190, K 3547, «68, K 1750, K 4172, «127, «26, K2641, K2621, 
K 3544, « 145, K 4195, K 765, K 5624) and one worker in the Berlin 
Museum (298). 
The two specimens B 18 651 and B 14935, which I regard as 
representing the hitherto undescribed male of C. mengei, are nearly 
8 mm long, black, with ample yellowish wings, with brown stigma 
and paler veins. The pilosity is sparse, the hairs being short and 
visible only on the gaster. The body is slender and shaped like that 
of most recent species of Camponotus , the head narrower than the 
thorax, suborbicular with rather small eyes and ocelli and the mandibles 
edentate, though having a rather broad apical border. Clypeus 
carinate. Antennse slender; maxillary palpi very long. Thorax robust, 
with convex mesonotum and scutellum ; epinotum in profile with 
subequal base and declivity, the former sloping and slightly convex, 
the latter slightly concave. Petiole thick, low and transverse, with 
rather sharp superior border. Gaster long and slender, with small 
narrow genitalia, the stipites and volsellae being shaped much as in 
the other species of the genus. Legs long, with the tarsal claws and 
empodia enlarged. 
Although the workers I have seen vary considerably in the size 
of the body and especially of the head, they all have the aspect of 
medise and minors and I have seen no specimen with the head 
sufficiently large to merit the designation of major- worker. One 
might infer from this fact that the workers of the amber Camponotus 
were less polymorphic than those of the recent allied species. Such 
an inference, however, would be premature, because the major workers 
in recent species are not only produced in much smaller numbers in 
the colonies than the medise and minors, but they are less inclined 
