FORMICID.'E. 



The 2 is a liea\ y apterous insect beai-inf,' a general resemblance 

 to the c? , but difteriiig considerably in the form of the thorax 

 and pedicel. 



The ^ is destitute of eyes or ocelli, lias the head more or less 

 square or rectangular, the thorax and node oF the pedicel flattened 

 above, with the pro-mesonotal suture distinct and the meso- 

 nietanotal suture obsolete ; the pedicel is one-jointed and the 

 abdomen somewhat depressed. 



The species of this genus form their nests in the ground, some- 

 times at a considerable depth. In India and Burma the c? is a 

 well-known insect, coming freely in the evening into houses to 

 lights. It is not unfrequently taken for a wasp, and there is a night- 

 flying wasp ( Vcspa doryUoides) which, as the name implies, 

 resembles Donjlvs S • 



Key to the Species. 



A. Second joiut of flagelliuu of uuteuuic pubescent 



beneath. 

 (I. Mandibles long, narrow, sickle-shaped, with a 



broad blunt tooth at base IJ. hthiatus, p. 2. 



h. Mandibles short, very broad for half their length 



from base, then abruptly narro-\\ed to an acute 



point D. Icei'iyatus, p. 3. 



B. Second joint of flagellum of antennae not pubescent 



beneath, polished and shining I), onetitali.^, p. 4. 



^ ^• 



A. Mandibles without teeth on the masticatory 



margin, apex acutely pointed D. kfviyntus, p. 4. 



B. Maiidibles with 2 teeth on the masticatory 



margin, apex broader. 

 a. Antenna? ^ Uiaj. 11-, ^ niin. 10-jointed .... D. la/natus, Tp. S. 

 h. Antenna? ^ niaj. and ^ min. 9-jointed D. orie)italis,T^.5. 



I. Dorylus labiatus, s/mcJc. Aim. N. H. \ (1840), p. 319, s ; Forel, 

 Jour. Bomh. N. H. Sac. xiii (1001), p. 464, ff ^ . 



Dorvlus hindostanus, Smith, 



Cat. vii (18o9),p. 3, S- 

 Dorylus fulvus, var. labiatus, 



JEmcn/, Zool.J(dtrb. (Si/st.) 



viii (1894-95), p. 709. 

 Dorylus (Typhlo])one) hevi- 



ceps. Smith, -Ind York. 



Miss., Hym . p. 1 3. fig. i>. ^ . 



(S . Brownish yelloM', 

 the head, except the man- 

 dibles, and the antennae 

 blaci<, the legs darker than 

 the body, the coxa? cas- 

 taneous brown ; the head, 

 the coxae, the apex of the metanotuui and of the pedicel, and 

 the apical abdominal segment covered with long yellowish curly 



V\^. 1. — Dorylus labiatus, (^ . 



