2 FORMICIDJE. 



The $ is a heavy apterous insect bearing a general resemblance 

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

 and pedicel. 



The is destitute of eyes or ocelli, has 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- 

 metanotal 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, coining freely in the evening into houses to 

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

 flying wasp (Vespa dorylioides) which, as the name implies, 

 resembles Dorylus <5 



Key to the Species. 



3 6. 



A. Second joint of fiagellum of antennae pubescent 



beneath. 



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



broad blunt tooth at base D. lalnatus, p. 2. 



b. Mandibles short, very broad for half their length 



from base, then abruptly narrowed to an acute 



point D. leei-if/atus, p. 3. 



B. Second joint of fiagellum of antennae not pubescent 



beneath, polished and shining D. orientalis, p. 4. 



A. Mandibles without teeth on the masticatory 



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



B. Mandibles with 2 teeth on the masticatory 



margin, apex broader. 



. Antennae $ maj. 11-, min. 10-jointed D. labiatus, p. 3. 



b. Antennae maj. and $ min. 9-jointed D. orientalis, p. 5. 



1. Dorylus labiatus, Shuck. Ann. N. H. v (1840), p. 319, 3 Ford, 

 Jour. Bomb. N. H. Soc. xiii (1901), p. 464, <J $ . 



Dorylus hindostanus, Smith, 



Cat. Mii (1859), p. 3, rf. 

 Dorylus fulvus, var. labiatus, 



Emery, Zool.Jahrb. (Syst.) 



viii (1894-95), p. 709. 

 Dorylus (Typhlopone) Ifevi- 



ceps, Smith, '2nd Yark. 



Miss.,Hym. p. 13. fig. 2. g . 



c? . Brownish yellow, 

 the head, except the man- 

 dibles, and the antenna? 

 black, the legs darker than 

 Fig. \.-Doryluslabiatus, rf. tbe ^dy, the COX83 cas- 



taneous brown ; the head, 



the coxae, the apex of the metanotum and of the pedicel, and 

 the apical abdominal segment covered with long yellowish curlv 



