72 INSECTS NOXIOUS TO AGRICULTURE. 



37. CTENOCHITON PERFORATUS, Maskell. 



N.Z. Trans., Vol. XI., 1878, p. 280; Vol. XVI., 1883, 

 p. 130. 



(Plate VIII., Fig. 2.) 



Test of adult female white, waxy, circular, nearly flat, 

 brittle, thin except at the edge. Fringe thin, segments broadly 

 triangular. Diameter nearly -Jin. The test is divided by narrow 

 lines of minute spots, corresponding to the spinneret orifices of 

 the insect, into rows of pentagonal or hexagonal segments. The 

 interior segments are only dotted, but the exterior row ex- 

 hibits curvilinear series of small perforations or air-cells arranged 

 in slightly radiating rows, which extend also to the correspond- 

 ing segments of the fringe. 



The test of the second stage of the female is very thin and 

 filmy, waxy, flat, slightly elongated ; the fringe as in the adult ; 

 but there are no perforations or air-cells. Length, about yifin. 

 Test of male waxy, thin, slightly elongated, rather convex ; 

 length, about -j^ in. Fringe and air-cells as in the female test. 

 At the abdominal end is a joint or hinge separating the last 

 segment. 



Adult female filling the test, shrivelling at gestation ; colour 

 greyish or greenish-white. General appearance somewhat 

 leathery. Hows of minute oval spinnerets run round the edge 

 and across the body, corresponding with the divisions of the test. 

 Antennae of six joints, the third joint being the longest, and 

 seeming double 011 account of the depressed ring : on the last 

 joint some hairs. Feet normal, with somewhat thick coxa3 and 

 femora : upper digitules long ; lower pair narrow. Anal ring 

 with eight hairs. A row of scattered small hairs runs round the 

 edge of the body. 



Female of second stage very thin and transparent, seeming 

 like a bluish-green film. The wavy edge is conspicuous. An- 

 tennae of six joints. 



Adult male yellowish. Antennae nine-jointed, every joint 

 except the first bearing several hairs. Feet normal ; upper 

 digitules not long, lower pair fine hairs. Thoracic band con- 

 spicuous and long. Abdominal spike short. 



Habitat On Pittosporum eugenioide, P. tenuifolium, Panax 

 arbor eum, Coprosma lucida, Rubus, &c., Riccartoii Bush, Christ- 

 church ; Nelson ; Dunedin ; Wellington. 



