LEPTOTHORAX TUBERUM, FAE. 63 



^nd S. baton ( ? ). A drive in the afternoon to the royal woods at 

 Tatoi produced one Cidaria and one lAthocolletis '. 



On the 28th we attempted to scale Mount Hymettus. We 

 committed the error of starting by the Monastery at the north end 

 and consequently never reached 3,000 ft. This mountain is very 

 barren, though it is not, as some assert, entirely composed of loose 

 scree. Males of G. ci/llaritu were abundant in one spot below the 

 Monastery (St. John) ; they also occurred on the mountain itself. 

 For the first time we secured ? s ; one of them was small and had the 

 left forewing teratologically malformed. With the first colony of 

 (J. cyllanis a few C. rnhi were flying, though the only captured 

 specimen was in rags, a 5 . l\ cardiii and 1\ atalanta were sailing 

 round the summit of the shoulder. To-day we brought our list of 

 different Orchids up to 14. 



On the 29th our last day, we motored to Marathon, through some 

 exceedingly pleasant country. On the coast by the battlefield we were 

 baffled by a Fapilio, certainly not /'. podaUviits, it appeared to be /*. 

 macliaon. A. citraria was also netted a few miles from Marathon. On 

 the return journey we took a pair of Leptnsia sinajii^i. A. helia and 

 C. painjihiltis were also taken at various halts along the road. The 

 list of Orchids had now reached 18, not bad for 19 days, and no 

 member of the party a botanist ! 



Leptothorax tuberum, Fab., subsp. corticalis, Schenk, an Ant new 



to Britain. 



By W. C. CKAWLEY, B.A., F.E.S. 



In a wood at Buckhold Hill, near Pangbourne, Berks, on April 

 ■24.th, 1904, I picked up an empty beech-nut, perforated with a small 

 hole, probably by some insect. Inside the nut were a $ , one ^ , and 

 tw'o half-grown larv^ of a species of Leptothorar. I took these ants 

 to the Oxford Museum, but was unable to identify them. They were 

 subsequently published as L. tuhcrum, Fab., race nijlanderi, Forst. 

 This year, however, ]\Ir. Donisthorpe and I examined the ants, and 

 decided that they did not belong to this race. Dr. Fore! has now 

 named them as L. tuberum, Fab., subsp. corticalis, Schenk, var. with 

 longer spines. 



I ajDpend a translation of Schenk's original description of this 

 subspecies, (in which Mr. Donisthorpe kindly assisted me), together 

 with a translation of Forel's description of the ^ s of this and the 

 other continental subspecies, which may be found in Britain, as well 

 as that of the two already known as British. 



.A. Myrmica corticaliit, N.S. (Schenk, Ja]n-. des ]'e)eins fiir Natitrkundc in Herzog. 

 Nassau, viii., 1852, p. 100.) 

 § . lJ-1^ 1. Middle of body and waist biown-red; upperside of head and the 

 whole abdomen, above and below, black-brown; the latter strongly shining. 

 Mandibles, back of antennse, underside of head, as well as legs, brown-red; 

 club of antenniB red-brown ; femora brownish, often also the nodes. The 

 whole body furnished with scattered yellowish hairs. Antennaj r2-jointed, 

 the tirst joint of Hagellum thickened and lengthened, the following one very 

 much shortened, the eighth a little longer, the ninth and tenth still more 

 lengthened and thickened, the last joint thickest and as long as the three be- 

 fore ; the four last form a club. The head is finely striated in lines; the 

 thorax shows, under the lens, weak unequal striation in lines ; the metathorax 

 has two very short, broad, three-cornered, horizontal spines ; on each side of 



