142 Mr. P. Cameron on some 



the apex and hyaline in the middle. In the apex of the 

 jDosterior wings is a well-marked appendicular cellule. 



Length nearly 6 lines ; alar exp. nearly 14 lines. 



Hab. — Brazil. 



In many respects this remarkal^le species differs from 

 the ordinary species of Taxonus^, but more especially in 

 the form of the abdomen and in the relative lengths of 

 the cellules in the anterior wings, Avhich agree better Avith 

 those of Str ongylog aster ; but in the form of the lanceolate 

 cellule and in the neuration of the posterior wings, and, 

 perhaps, also in the antennas, it comes nearer to Taxonus. 

 If it does not belong to that genus there is no other 

 described in which it can be placed. In some of the 

 ' species of Taxonus there is an appendicular cellule in the 

 posterior wings. 



Zarca, gen. nov. 



Antennre densely pilose, 9-jointed, the 1st a half longer 

 than the 2nd, with a slight pedicle at its base, the 3rd the 

 longest, a quarter longer than the 4th, the succeeding joints 

 become gradually shorter ; the apical is sharply conical, 

 much thinner than the 8th ; the 4th, 5th and 6th are much 

 thicker than the others ; the three apical are closely packed 

 together. The antennae are placed immediately over the 

 clypeus, which is very small, and over each is a large, 

 projecting, somewhat oval tubercle. The palpi are very 

 long. The eyes reach the base of the mandibles. The 

 thorax has the sutures deep, the collar Avell developed : 

 the scutellum is small, globular, and does not reach the 

 elevation of the sutures on the mesonotum. The abdomen 

 is somewhat cylindrical and ends in a sharp point ; the 

 saw projects considerably. The legs are rather long, the 

 posterior pair being longer than the whole body ; the 

 coxa3 are large, projecting, the posterior pair reaching to 

 the fourth abdominal segment, so that the abdomen appears 

 very short, looking at it from beneath ; the tarsi are much 

 longer than the tibias ; its 1st joint is longer than all the 

 others, deeply grooved and flattened on the lower surface ; 

 the 2nd joint is a little longer than the 3rd, the 4th is 

 very small ; and the 5th is nearly as long as the preceding 

 two, and bears single, short claws. Wings with two 

 marginal and four submarginal cellules. The marginal 

 are nearly equal, the second having a nervure proceeding 

 round its upper margin from the stigma to the end of the 



