ARTICLE v.— DESCRIPTIONS OF FOUR SPECIES OF HYMENOPTERA 



FROM AUCKLAND ISLAND. 



By P. Cameron. 



The Hymenoptera collected by Mr. G. V. Hudson during the expedition of the Canter- 

 bury Philosophical Society to Auckland Island are four in number. One of them — 

 the Apantdes — belongs to an almost cosmopolitan genus of parasites, chiefly on 

 Lepidoptera, not yet recorded from New Zealand ; but several species are known 

 from Australia. The three ichneumons belong to a new genus, remarkable for the 

 females being semiapterous, the male being fully winged, if I have correctly united 

 the male in the collection to the same genus as the females ; and I have no doubt 

 that I have done so, for, apart from the fact that the females and the male were 

 taken in the same place, they agree in the body-structure and, more particularly, 

 in the structure of the metanotum, which differs from what we find it to be in the 

 genera belonging to the Ichneumoninae in the known total absence of areae or keels. 

 The species were taken at Carnley Harbour, Auckland Island, in November. 



ICHNEUMONIDAE. 

 AucKLANDELLA, gen. nov. 



Wings abbreviated, reaching, when turned back, hardly to the apex of the 

 Ist abdominal segment ; radial cellule closed, complete, the radius issuing from 

 shortly beyond its middle ; the median and submedian cellules complete ; the 

 transverse median nervure received beyond the transverse basal, as are also the 

 cubito-discoidal and the 2nd discoidal cellule. There is a large areolet, narrowed in 

 front ; both the nervures forming it are united to the basal third of the radius ; 

 the 1st has a rounded oblique slope, the 2nd is straight, not so sharply obliquely 

 sloped ; the cubital nervure does not extend much beyond the 2nd transverse cubital 

 nervure, and issues from shortly below the middle of the 2nd discoidal cellule. In 

 all there are only 6 closed cellules. The cubitus in the hindwings is broken very 

 shortly above the middle ; in front are 2 cellules, the basal extending beyond the 

 middle, the apical small, almost semicircular. Metathorax entirely without keels, 

 and consequently without areae ; the spiracles small, broadly ovate. Mesonotum 

 somewhat depressed. Basal joints of flagellum about 3 times longer than wide. 

 Eyes long, narrow. Mandibles bidentate. First abdominal segment broad at the 

 base, becoming gradually wider towards the apex, which has not a clearly defined 

 post-petiole ; there are 8 segments, the last short ; there is a long, projecting ovi- 

 positor, with a broad sheath. Legs stout, the hinder tibiae broadly narrowed at the 

 base ; the apices of the tarsal joints spinose. 



The antennae in the small species (A. nigromaculata) are 23-jointed ; in it, 

 too, the radius does not extend much beyond the 1st transverse cubital nervure ; 

 the 1st transverse cubital nervure is widely broken in front ; the 2nd is short. In 



