34 HYMENOPTERA. 



a»i(l covered with a silky cinereous pile. Head emarginatc be- 

 hind. The thorax deeply strangulated at the base of the meta- 

 thorax ; the scale of the peduncle narrow, incrassate, obtuse 

 above. Abdomen ovate, black, and covered with grey silky pile. 



Hab. Port Natal. 



This species is attached by its mandibles to the leg of a species 

 of Pausus. 



115. FoRMIC.\ LACTEIPENNIS. B.M. 



Female. Length 4.V lines.— The head, thorax and abdomen 

 above brown -black, the two latter pale testaceous beneath ; the 

 flagellum, man(lil)les and legs testaceous; the tibiae and tarsi 

 lather darker than the femora ; the head oblong, slightly emar- 

 ginate behnid ; the metathorax testaceous, more or less dusky 

 libove ; the scale of the peduncle pale testaceous, ovate, notched 

 above; the wings milky-white, the nervures pale testaceous 

 vellow ; the abdomen ovate, its base and the apical margins of 

 the segments pule testaceous ; the insect is smooth and shining. 



Worker major. Length 4. V lines. — Black: the llagellum and 

 legs rufo-testaceous, the tarsi dusky; head very large, deeply 

 emarginatc behind ; thorax narrow, widest in front, compressed 

 behind ; the diskal line of the thorax curved from the base to 

 the apex; the scale pale testaceous and narrow, its margin 

 entire ; abdomen ovate, with the apical margins of the segments 

 and the base beneath pale testaceous. 



Worker minor. Length 4 lines. — Head elongate, much nar- 

 rowed behind the eyes, the latter rather large and ovate ; face 

 anteriorly, the clypeus, palpi, flagellum, and extreme base and 

 apex of the scapej ))ale ferruginous ; the scape fusco-ferruginous. 

 Thorax elon;iare, narrow, compressed behind, pale rufo-testa- 

 ceous, with thf (iisk of the thorax slightly fuscous. Abdomen 

 ovate, the base and the scale of the peduncle pale rufo-testaceous ; 

 the scale incrassate, elongate, narrow, rounded above. 



Male. Length 'A lines.— Head, antennae, thorax, legs, and 

 scale of the peduncle, pale rufo-testaceous; the head and abdo- 

 men small, the latter fuscous ; the wings milky-white, the ner- 

 vures yellow ; the scale of the peduncle incrassate, quadrate, and 

 deejjly notched above. 



Hab. Port Natal. 



The sexes of this species were taken from the nest, which is 

 usually constructed in fallen timber ; collected by Mr. R. W. Plant. 



116. Formica cosmica. B.M. 



Worker major. Length 3| lines. — Black: the head and 



