No. 565] GYN ANDROMORPHOUS ANTS 



53 



male on the right, worker on the left, the line of division 

 running to the left of the median line so that the black of 

 the right side of the mesonotum encroaches on the red 

 color of the left side. Petiole and gaster sharply divided 

 into black right and red left halves, the right half of the 

 latter also with male pilosity and sculpture. External 

 male genitalia and anal sternite on the right side. The 

 red and black coloration is sharply divided on the venter, 

 but the coxae are all black and red as on the male, and the 

 legs on both sides are somewhat inf uscated. Tarsi longer 

 on the right (male) side. Wings well developed, on the 

 right side only, with pale veins and stigma and more like 

 those of the female. Length 7 mm. 



This specimen was taken by Mr. Donisthrope July 20 

 or 21 from a large colony in Bewdley Forest, England. 



5. Lateral Gynandromorph of Formica sanguinea 

 Latreille.— Donisthorpe (1909, p. 464, Fig. 2) 



A nearly complete lateral gynandromorph, male on the 

 left, female on the right side. The head is of the female 

 type, rather small, with both of the antennae and the ocelli 

 female and the left eye a little larger than the right. 

 Head black, clypeus and right mandible red ; thorax evenly 

 divided into a black left and red right half, but only the 

 upper right corner of the epinotum red. A piece of the 

 scutellum and postscutellum red on the left side where 

 the wing is inserted. Petiole sharply divided into a red 

 right and left black half. Gaster black, the pilosity and 

 sculpture on the right half female, on the left half male, 

 the color being sharply denned on the venter. Legs and 

 coxae female on the right, male on the left side. External 

 genitalia of the male type present on the left side. Both 

 pairs of wings fully developed, but the stigma and veins 

 darker as in the male. Length 9 mm. 



This specimen was taken from the same colony as the 

 preceding. 



