120 Mr. Smith's Essay on the Genera and 



Myrmica sulcinodis, Nyland. Adno. Mon. Form., p. 934, 5. 

 M/jrmica jjerelegaiis, Curtis, Trans. Linn. Soc, xxi. 214, 5, 

 tab. 4. fig. 15 $, 16 2, 17 g. 



Female. — Length 2| lines. Head and abdomen very dark rufo- 

 fuscous: sometimes the latter is nearly black ; the scape usually 

 rather darker than the fl.igellum and slightly fuscous above, but 

 at other times the antennae are entirely rufo-testaceous ; the legs 

 also differ in being sometimes entirely pale-red, sometimes only 

 the tarsi are pale, according to the maturity of the insect ; the 

 head is longitudinally roughly rugose ; the thorax and nodes of 

 the abdomen longitudinally rugose-sulcate : the spines of the 

 metathorax elongate, acute, and curving slightly inwards ; the 

 scape is slightly curved at the base ; the wings clear liyaline, 

 the nervures and stigma pale testaceous; abdomen very glossy 

 and sprinkled with pale glittering yellow hairs. 



Worker. — Length 2 lines. Differs from the female scarcely in 

 anything except size; the spines are however more erect, and the 

 workers are usually darker in colour. 



Mfl/e.—- Length 2| lines. Dark fuscous, sometimes nearly black, 

 the head longitudinally roughly rugose ; the mandibles, flagellum, 

 and apex of the scape, pale rufo-testaceous, the latter frequently 

 fuscous above at the base, sometimes only shghtly so ; thorax 

 above longitudinally sulcate, most deeply so on the metathorax 

 above and at the sides ; the metathorax sub-marginate behind, 

 ths posterior truncation smooth and shining; the joints of the legs, 

 as well as the tarsi, pale rufo-testaceous; the wings of a pale 

 yellow hyaline ; the nervures and stigma pale testaceous ; the 

 apex of the nodes and of the abdomen pale rufo-testaceous. 



This distinct species appears to be very local ; I have never 

 met with it. Mr. Dale has captured the male and worker in 

 Wales, and I am indebted to Mr. Curtis for examples of the sexes 

 taken at Bournemouth, Hampshire: the male is here described 

 for the first time. Possessing several specimens of Nylander's 

 species, presented by himself, and also others from M. Mayr, of 

 Vienna, I have been unable to recognise the slightest difference 

 between these and specimens presented by Mr. Curtis. 



Sp. 5. Myrmica denticornis. 



Fcem'ma. — Testaceo-ferruginea, sparse flavido-pilosula ; capite 

 supra abdominisfpie dorso medio fuscescentibus; niandibulis et 

 pedibus flavido-tcstaceis ; alis hyalinis, nervis testaceis, capite 



