AND OTHER INDIGENOUS ANTS. -. 215 
6. M. AcERVORUM, Fabr. Ent. Syst. vol. ii. p. 358. M. lacteipennis, Zett. Ins. Lap. d. 
I have never met with this species, but Mr. Smith has taken the male, flying in abun- 
dance in a fir-grove in Hants, in September, and also under bark of trees in the same 
county. 
7. M. DENTICORNIS, Curt. 
Male (fig. 18) pale dull castaneous, sparingly hairy: head with indistinct irregular 
strie; eyes black; mandibles pale straw colour. Antenne fulvous. Thorax smooth, 
shining, indistinctly sculptured; the scutel with an ochreous margin, finely striated, as 
well as the postscutel, which is concave behind, the angles forming short acute spreading 
spines. Petiole with ochreous articulations; basal nodule a little elongated and irregu- 
larly striated, second nodule smooth and shining: abdomen very glossy, often darker, the 
margins of the segments paler. Wings slightly tinted, the stigma and nervures pale ful- 
vous. Legs fulvous; coxæ, tips of thighs and tarsi pale ochreous: 24 lines long. 
Female undiscovered. 
Neuter (fig.19) castaneous-black: head finely striated, clypeus with fewer but stronger 
striæ ; mandibles ochreous, the teeth and base pitchy. Antenne fulvous, stoutish, con- 
siderably clavate (fig. 20), the scape angulated at the base and producing a minute dark 
tooth (fig. 20,f). Thorax very rugose, being irregularly sculptured all over, the angles of 
the postscutel forming two long divaricating spines, pale at the tips. Petiole stoutish, 
basal nodule ovate, truncated behind, second globose, both very rugose : abdomen very 
smooth and shining, with short pale scattered hairs, and subferruginous at the apex. 
Legs entirely fulvous; thighs and tibiz clavate: length 2 lines. 
By the peculiar contour of the scape at the base, which forms a knee producing a mi- 
nute tooth in the neuter, and probably is similar in the female, this very distinct species 
is no doubt allied to the M. lobicornis of Nylander; but as this tooth is much less deve- 
loped than in his Myrmica*, and he says, “ capite, thorace nodisque segmenti primi lon- 
gitudinaliter striatim profunde rugosis +,” our insects must be different, for the head of 
mine is merely finely striated, and the thorax and both nodules are exceedingly rugose, 
but not longitudinally striated. 
I red AG ndr and four neuters from a nest in Scotland in July 1825; but I 
did not observe any females. 
8. M. casprtum, Linn. Faun. Suec. 1726; De Geer, vol. ii. p. 1105. pl. 43. figs. 15 & 16 y + 
figs. 21 &22 d. M. fuscula, Nylander, p. 935, & pl.18. fig. 349, & p.1053 9. M. im- 
pura, Foerst. var. teste D. Nylander, and possibly M. modesta, Foerst., also. 
I only know the male of M. cespitum by De Geer’s memoir and figures, and until we 
possess that sex, together with undoubted females, I shall not be satisfied regarding our 
members of this species, for our neuters do not altogether accord with Nylander’s and 
Foerster’s descriptions.. In the British examples, the tibiæ, as well as the thighs, are 
pitchy, the head is finely striated, not rugulose, neither will the sculpture of the thorax 
* Adn. Mon. Form. pl. 18. f. 32. + Ibid. p. 932. 4. 
