294 BRITISH ANTS. 



May to September. Schenck records males as met with in a nest 

 at Nassau on May 19th, 1852 12 , and both sexes in other nests from 

 July 9th to 18th 11 . Forel gives the middle of June to the end of 

 July 25 , and Wasmann the middle of May to July, and he says 

 males and females are seldom found in the same nest at the same 

 time 50 , but Smith found all the sexes in the nest in August 15 . 

 I have found males only in nests at Woking and Weybridge in 

 July, August, and September, winged females in plenty in nests 

 at Woking on June 29th, 1912, and males and winged females 

 together in the nests at Bewdley on July 20th, 1909, etc. On 

 September 5th, 1913, I took some micraners, only 6 mm. in length, 

 at Weybridge ; at Bewdley on July 20th, 1909, micraners 64 measur- 

 ing 7 mm., while the largest male met with in that locality was 

 10 mm. in length. Escherich mentions sanguined females with short 

 wings 55 , which from what we know of such cases in Donisthorpea, 

 etc., may be mermithogynes ; Wasmann records workers of the 

 size of normal females, but with broader thorax and shorter wings, 

 which he classes as gynaecoid macropseudogynes 50 . 



Three gynandromorphous specimens of sanguined have been 

 recorded. Tischbein 8 found an ergatandromorph in a sanguinea nest 

 on July 28th, 1851, at Herrstein, in which males but no winged 

 females occurred. This may be described as follows : 



Nearly complete lateral ergatandromorph ; male on left, worker on right 

 side. In the head, the left mandible, outer third of clypeus, antenna, eye, 

 median and lateral ocellus, are male, though the black colouring also covers 

 the smaller right ocellus. Remainder of head red (worker). Thorax and 

 petiole male on left, worker on right, the line of division being median on 

 the dorsal surface, and the structure of the meso-, meta-, and epinotum 

 correspondingly asymmetrical. Left half of thorax black, right half red, 

 sharply divided above ; on the ventral surface the dividing line is median 

 only on the prothorax but passes outside the middle and hind coxa on the 

 male side. Petiole sharply divided into a black male (left) and a red worker 

 (right) half. Gaster black, with a large red blotch on the right side at the 

 base of the first segment. The pilosity and sculpture of the left side are male, 

 those of the right, worker. External male genitalia are present on the left 

 side and the anal sternite is present only on this side. Remaining organs of 

 this region quite malformed. All the legs, and the coxae of the male side, are 

 red and hence of the worker type. Wings of the male (left) side of normal 

 size, but their veins and stigma are paler. There are no wings on the worker 

 (right) side. 



This appears to be the first description of a gynandromorphous 

 ant. When examining sanguinea nests at Bewdley I had the good 

 fortune to meet with an ergatandromorph on July 20th, 1909, and 

 a gynandromorph on the following day, both in the same colony ; 

 these I described thus : 



" Nearly complete lateral ergatandromorph ; male on right side, worker 

 on left. Right antenna male, left worker. Right mandible, eye, lateral ocellus, 

 and median ocellus male ; left mandible, eye and lateral ocellus worker. 

 The head is black, with the exception of the left mandible, left half of clypeus, 

 a small patch before left eye, and left cheek, which are red. Thorax and petiole 



