THE YOUNG NATURALIST. 255 



BRITISH ANTS— By O, 0. BIONELL. 

 (Continued fvom page 239 J 



female and worker, as well as the keeled 

 clypeus of the male, will distinguish it from 

 all its allies. 



1. Stenamma Westwoodii, Westw. 



Male. — Browni.sh black ; antennae, man- 

 dibles, sides of prothorax, and legs pale, 

 slightly hairy ; head and thorax dull, abdo- 

 men smooth and shining ; wings with one 

 submarginal and one discoidal cell, the 

 marginal cell incomplete. Length, 5 mill. 



Female. — Testaceous, smooth and shin- 

 ing, with short scattered hairs ; antennae 

 rather densely clothed with short hairs, 

 basal joint of the flagellum as long as the 

 next three together; metathorax with two 

 rather short, triangular spines, second node 

 of the petiole beneath produced in front 

 into a strong spine ; abdomen more or less 

 brown across the middle ; wings white. 

 I Length, 5 mill. 



Worker. — Very much like the female. 

 Length, 3-4 mill. 



Habitat.— Rare, have been found in the 

 nests of Formica nifa. 



Genu.s ASEMORHOPTRUM, Mayr. 



1. Asemorhoptrum lippula, Nyl. 



Male. — Brown, the antenna: and legs 

 paler, sparsely clothed with long fine pale 

 hairs ; antenna: with thirteen joints, the 

 scape as long as the first three joints of the 

 flagellum ; wings ciliated, somewhat opaque, 

 nervures very pale ; metathorax nearly 

 smooth, with a tooth on each side at the 

 apex ; abdomen smooth and shining ; Jirst 

 joint of the pctioh' very long; apex of the 

 .'ibdomen densely covered with slightly 

 curled whitish hairs. Length, 4 mill. 



Female. — Reddish brown, mandibles, 

 antennae, and legs paler ; head rather elon- 

 gate and narrow ; tliorax irregularly, longi- 

 tudinally rugose; metathorax with two 

 I short spines ; lirst joint of the petiole elon- 

 ! ?ate, with a ratlier bmall apical node, second 



node nearly round, first segment of abdo- 

 men beyond the petiole very long, at least 

 three times as long as the remainder. 

 Length, 5-6 mill. 



Worker like the female, but only half 

 the size. Length, 3 mill. 



Habitat. — Have been found in the nests 

 oi Formica fuaca and Laitius fuliginotut . 



Genus TETRAMORIUM. Mayr. 



1. Tetramorium csespitum, Linn. 



Male. — Brown-black, shining; head much 

 narrower than thorax ; antennae and legs 

 paler, antennae with ten joints ; thorajc 

 clothed with scattered hairs ; nodes of the 

 petiole short, the second widely transverse ; 

 abdomen polished and shining, with a few 

 pale hairs ; wings white, with one marginal, 

 one submarginal, and one discoidal cell, 

 nervures pale. Length, 6-7 mill. 



Female. — Head as wide as thorax, or 

 nearly so ; antennae with twelve joints ; 

 mesothorax irregularly punctured ; apex of 

 the metathorax emarginate and spined at 

 each side ; abdomen oval, with pale scat- 

 tered hairs ; wings as in the male. Length, 

 7-8 mill. 



Worker. — Dark brown ; thorax, sides of 

 head, antennae, mandibles, and legs not so 

 dark ; head large, wider than the thorax ; 

 thorax longitudinally striate, widest in front; 

 metathorax with two sharp spines; nodes of 

 the petiole much elevated, smooth ; looked 

 at sideways almost as high as long ; looked 

 at from above, not quite so wide as long ; 

 second node, looked at sideways, nearly 

 round ; looked at from above, transverse ; 

 abdomen shining and polished ; entire 



1 insect clothed with scattered long hairs. 



j Length, 2-4 mill. 



Habitat. — Common in certain sandy 

 localities ; abundant at Whitscmd bay, near 

 Plymouth, found under stones, also forming 

 small earth mounds. Saw young larvx on 

 the Olli May. 



('i'o be continued on pa^e 271.) 



