AND OTHER INDIGENOUS ANTS. 219 



brown. Legs tawny, thighs and tibiae pitchy, except at the extremities: length 1|, 

 expanse 3^ lines. 



Female (fig. 22) black : head suborbicular-quadrate irregularly striated, clypeus biden- 

 tate (fig. 23) ; eyes and ocelli minute, mouth ferruginous : mandibles large and prominent, 

 with many minute teeth ; neck distinct, ferruginous : antennae remote, not long, stoutish, 

 geniculated, 12-jointed and clavate, scape long, second joint cup-shaped, seven following 

 transverse, the third being very short, the ninth much longer, the remainder forming a 

 club, the apical joint being long and conical (fig. 24). Thorax not so large as the head, 

 obovate, hollowed and striated before ; the scutel, which is smooth, has the suture at the 

 base ferruginous ; postscutel very short, punctate, with two short but distinct spines (figs. 

 25 and 26 6). Petiole ferruginous, elongated, hairy, basal nodule subquadrate or ovate, 

 second broader, transverse, and partially striated (figs. 25 and 26 *) : abdomen very smooth 

 and shining, rather broad, slightly depressed and oval, the apex ferruginous. Wings fus- 

 cous, exactly like the male. Legs ferruginous, stoutish, especially the anterior, which are 

 rather short : length If, expanse nearly 4 fines. 



Neuter undiscovered. 



This species, which I dedicated to my esteemed friend Mons. P. A. Latreille, is quite 

 distinct from any other type of the Formicidce that has fallen under my observation. It is 

 now twenty-five years at least since I discovered the males near that romantic spot, Black 

 Gang Chine in the Isle of Wight, but I have since found others near Greenwich, towards 

 the end of August ; and at Sandgate in Kent, in October. It was not till August 1836 

 that I had the satisfaction of taking, what I consider to be, the female of this insect, at 

 Lulworth Cove. It is remarkable that Mr. P. Smith should have caught a female also in 

 Camden Town, on the wing, and as he has also found the male at Colney Hatch, it seems 

 to be generally distributed in the southern counties. It appears to affect swampy locali- 

 ties, for all the males I have taken were flying about and settling upon rushes, and my 

 female was captured close to a spot where rushes and reeds were growing. 



As it is inconvenient to retain useless names, it is advisable to state that Myrmica 

 binodis must be expunged from our British lists, and of the eleven Formica recorded in 

 my Guide*, there are only eight which are ascertained to inhabit Great Britain. No. 1. 

 F. pubescens, Latr. and No. 8. F. emarginata, Oliv. were admitted on doubtful authority, 

 and No. 11. F. cognata, Steph., is not to be found in the British Museum, where Mr. Ste- 

 phens's collections are deposited. 



* Curtis' s Guide to an Arrangement of British Insects, 2ud Edition ; Genus 661. 



2g2 



