117 



Type $ and allotype $ in the collection of the Hawaiian 

 Entomological Society, paratypes in the collection of the Ha- 

 waiian Sngar Planters' Association, in the U. S. National 

 Mnsenm, and in the author's collection. 



Xamed for Mr. Swezey, who first bred this little species, 

 as he has so many of the immigrant parasites. 



ALIENIDAE. 



6. A Peculiak WixctLess Hy.mexoptkrox FoinEixo the 

 Type of a Xew Genus and Fa:mily. 



The apterons insect described below is so peculiar that it 

 will not fall into any of the families at pi-esent recognized, 

 and rather than alter the limits of some recognizable family 

 to include this highly anomalous form it has seemed better to 

 erect for it a family of its own Alien idae. Even so it re- 

 mains doubtful in what superfamily this genus should find 

 place. 



Aeiexus n. gen. 



Head slightly broader than the thorax and abdomen, quadrate in 

 the dorsal aspect, declivous in front and prolonged into a short snout 

 in front of the large oval facetted eyes which occupy the greater part 

 of the sides of the head. Face concave for the insertion of the an- 

 tennae and coarsely ol^liquely striate. Antennae inserted just in front 

 of the mouth near the mandibles which are small nearly straight and 

 conical without teeth, malar space longer than broad ; mouth cavity 

 small, triangular, margined, anterior to the eyes, no evident gular 

 cavity or suture, ocelli moderate, arranged in an acute triangle, the 

 posterior pair adjacent to the inner orbits and considerably more 

 than their distance apart before the occipital margin, occiput finely 

 margined. Antennae filiform, 13-jointed, strongly geniculate, scape 

 subcylindrical elongate, a little thicker toward the base, flattened 

 on the side next the flagellum, about as long as the pedicel and first 

 three flagellar joints not quite attaining the level of the anterior 

 ocellus, pedicel elongate, half as long as the first flagellar joint, second 

 and following joints successively shorter, the last five each about as 

 long as broad, the last joint about as long as broad and narrower and 

 rounded at ape.x. 



Pronotimi loosely articulated with the mesonotum, quadrate, mas- 

 sive, truncate in front and slightly arcuately emarginate behind with 



