1919] Wheeler — Two Gynandromorphous Ants 5 



rarer anteroposterior, decussating, mosaic or blended types, but 

 exhibits a mixture of all of them. The mandibles and clypeus have 

 the sexual characters of the lateral type but the arrangement of 

 colors in the clypeus is the reverse of that of the mandibles and 

 hence decussating. The head is female in form but partly blended, 

 partly mosaic and feebly lateral. The eyes, antennae, anterior 

 ocellus and left posterior ocellus are strongly male. The right 

 posterior ocellus, the right eye, which is distinctly smaller than 

 the left, and the large area of reddish-yellow integument sur- 

 rounding it, show that the right side of the head is more female 

 than the left. The thorax in front of the epinotum is a blend of 

 male and female characters, the pronotum being more female, the 

 mesonotum and scutellum more male as are also the color, sculp- 

 ture and pilosity of these three regions, whereas the epinotum and 

 petiole are purely female. The wings are female but with the 

 female tendency to deflation only in the hind pair and the reverse 

 or male tendency to persistence in the articulations of the anterior 

 pair. But the latter show in the retention of the anterior half of 

 the recurrent vein a very interesting condition precisely half-way 

 between that of the normal male and female wing. The hind legs 

 are purely female but the two anterior pairs show a peculiar decus- 

 sation, the left fore and right middle leg being more female in form 

 and coloration and the right fore and left middle leg more male. 

 This decussation of characters is similar to that of the mandibles 

 and clypeus but less pronounced. It is very probable that the 

 internal reproductive organs are more or less hermaphroditic, as 

 they are situated in segments which externally exhibit a very 

 striking mosaic of male and female characters. 



Camponotus (Colobopsis) albocinctus Ashmead (Fig. 2c) 



Dinergatandromorph. Length 4 mm. 



In all respects like a normal soldier, except in its smaller size 

 (the normal soldier measures about 5 mm.) and in having the head 

 asymmetrical, with its smaller right half exhibiting male charac- 

 ters. The right eye is larger, more convex and nearer the middle 

 of the side of the head than the left. The right antenna is 13- 

 jointed, with the terminal joint short and aborted, and the right 

 mandible, though much shorter than in the male (Fig. 2a) has only 

 two teeth separated by a wide concavity of the apical border. 



