487 



DESCKIPTIONS OF A NEW GENUS AND TWO NEW 

 SPECIES OF TENTHREDINIDjE. 



By Walter W. Froggatt. 



The saw-flies for which the following genus is proposed are 

 nearest allied to the well-known genus Pterygophorus, of Klug, 

 having long many-jointed antennae, and somewhat similarly shaped 

 wings, but are very unlike in other details. 



They are inhabitants of the tropical scrubs of the northern parts 

 of N. S. Wales and Queensland. The first species was taken by 

 me at Cairns, N. Queensland, when collecting for Sir William 

 Macleay in June, 1886. The second is in the Macleay collection 

 with a label " Australasia." I have recently been enabled to find 

 its locality and describe the female, from several specimens of the 

 female and one male, collected by Mr. R. Helms at the Richmond 

 River in the beginning of this winter. 



Philomastix, n.g. 



Antennae 18-jointed in both sexes ; $. 1st and 2nd joints short, 

 obconical, the 3rd- 18th infundibuliform, the 3rd twice the length 

 of the 4th, the rest progressively decreasing in length, the 18th 

 rounded at apex, and slightly constricted in the middle ; 9. 1st 

 joint obconical, twice the length of 2nd, which is very short, 3rd 

 long, twice the length of 4th, 4th-17th more elongate viewed from 

 above, from below more serrate, last two joints forming a papilli- 

 form club, the last joint slightly constricted in the middle. Head 

 twice as wide as long, but not as wide as thorax ; eyes large and 

 prominent ; clypeus large, not incised ; labrum of moderate size, 

 rounded at apex ; mandibles with one subapical tooth. Thorax 

 large, rounded in front, channelled in the centre, and at both sides 



