38 ON THE PSELAPHIDJE OF AUSTRALIA, 



Narcodes. Nov. Gen. 

 Palpi maxillares, 4-articulati, 1""° minimo, 2^° eloagato post- 

 medium inflate, 3"° ad basin inflato leviter-setoso, 4'° clavato 

 tertii lateri imposito. Antennae, 11-articulatcB, ad bases 

 approximatfe. Tarsi breves, unguibus duabus aequalibus 

 instructi. Corpus setis squamiformibus tectum. 

 This genus comes next to Centrotoma, with which it curiously 

 agrees in the scaly shape of the setag. It differs, however, from 

 that genus in having four joints in the maxillary palpi, as well 

 as in the shape of those organs. The position of the fourth 

 joint, which is attached laterally to the third (fig. 1 a.) at once 

 distinguishes this genus from other members of the family. 



Two species have occurred to me, both in the one locality, 

 and living under the same circumstances. 



Sp. 1. N. varia. R. L. King. 

 Fumosus, maculis nigris irregularibus ; antennarum articulo 

 2Qmo truncate -globoso ; Thorace capite breviori, angulis 

 anticis acutis ; Palporum maxillarium articulo 4" juxta 

 medium partis 3'" inflatae imposito. 



Long. -5^°o poll-» fig- 1- 



Under stones, Parramatta, July- September, 1862. 



Head somewhat square, contracted in front, carrying a tubercle 

 from which the antennae spring ; the back part is somewhat flat, 

 occasionally carinate at the sides ; a second carination extends 

 from the back of the head to a little beyond and below the eye. 

 Antennee covered at their very approximate bases by the prolon- 

 gation of the frontal plate. They are of the ordinary form, eleven- 

 jointed. The first joint equals the second and third together, the 

 third being longer than the second ; from the third to the eighth the 

 joints gradually decrease in length, the eighth being the shortest 

 in the whole antennas, joints nine — eleven (Fig. 1 b.) form 

 a moderate club, the eleventh being as long as the two preceding 

 and of a pitchy colour ; the squamiform setae are here replaced 

 by setse of the ordinary form ; the mouth is very inferior. Man- 

 dibles strong, armed at the extremity with four blunt teeth, a 

 strong tooth being also visible on the outside near the base. 

 Maxillary Palpi of four joints (Fig. 1. a.) first very small, 

 second elongated, thin at the base, curved in the middle, and 



