222 Mr. E. Saunders' Sijnopsis of British 



in the walls of the nests of other ants, so that the two 

 species do not intermix, and, although living in such 

 close proximity to one another, are bitter enemies, and 

 fight ferociously if they meet. The channels cut out by 

 S.fu(/ax axe so fine that they will only just admit the 

 insect. The long account given by Forel, quoted above, 

 is well worth reading. 



MoNOMORiuM Pharaonis, Linn. Syst. Nat. ed. x. Vol. i. 

 p. 580. = Diplorho'ptrum doinesticum, Sm. 



This genus and species can hardly be included 

 amongst our indigenous Hymenoptera, yet it is unfortu- 

 nately so common now in many houses that I cannot 

 leave it out. 



It belongs to the same division as Solcno2:)sis fugax, the 

 (? having no converging lines on the mesothorax, 

 and the 2 and ^ no spines on the metathorax. Its 

 elongate form and almost naked surface at once dis- 

 tinguish it from, f II (jax, as well as the short terminal joint 

 to the antennae, which is not more than half as long as 

 the rest of the fiagellum. The ^ also has 13-jointed 

 antennae, and the ? and ^ 12 ; the club composed of 

 three joints. 



Common in some houses in London, Hastings, &c. 

 "A native of tropical and subtropical countries through- 

 out the entire world, living in houses." — Forel and Emery. 



Myrmecina, Curt. (PI. VII. fig. 8.) 

 Brit. Ent. vol. vi. fol. 226. 



^ antennse 13-jointed, ? and ^ 12-jointed; maxillary 

 palpi 4-jointed, labial palpi 3-jointed ; mandibles small 

 in the <? , with three teeth ; those of the ? and ^ with 

 two strong teeth, and seven indistinct small ones ; wings 

 very dark and hairy, and margins ciliated, with an ap- 

 pendiculated marginal cell and one submarginal ; meta- 

 thorax spined in all the sexes, but very shortly so in 

 the (? ; first node of the petiole nearly square in all 

 the sexes, second somewhat rounded in front, truncate 

 behind. 



1. LatreiUei, Curt. Brit. Ent. vi. fig. 265 <? . Smith 

 Brit. Foss. Hym. pi. i. fig. 19, ? . 

 ^ black-brown, covered with rather long hairs ; an- 

 tenna and legs somewhat paler. Head with the vertex 



