Maskkll. — On Psyllidac in Neir Zealand. 161 



is very slightly swollen in the middle, but does not bear any 

 lateral processes ; h are two terminal processes set close 

 together ; c is the penis. All these appendages bear several 

 short hairs. 



Pup£e active, gregarious, naked, except for a slight mealy 

 covering, and for the loose cottony threads in which they 

 move ; length about ^Vn. Viewed dorsally, the head is dark- 

 purple, almost black,"with a narrow median longitudinal stripe 

 of yellow ; thorax yellow, with dark-purple rectangular patches 

 on'each side ; abdomen m the anterior half yellow with iwo 

 narrow transverse purple stripes interrupted in the middle, 

 and in the whole of the posterior half dark-purple ; rudi- 

 mentary wing-covers dark-purple ; antennae yellow, darkening 

 nearly to black at the tips. Viewed ventrally, the head and 

 thorax are yellow, the abdomen yellow with rectangular purple 

 patches; legs dark-yellow. Eyes dark-brown, scarcely at all 

 prominent. Head broadly rounded in front, without conical 

 processes. Antennae of nine joints, the first two short and 

 thick, the third and seventh the longest ; the last three joints 

 are ringed, and the last bears a short spine. Legs thick and 

 clumsy ; claw double. Eostrum short. Eudimentary wing- 

 covers attached to the thorax, not extending to the head, and 

 the hinder one only just reaches the second segment of the 

 abdomen. There is no conspicuous fringe round the body, but 

 the abdomen exhibits some lanceolate spines (fig. 13). If the 

 pupa is macerated in potash the purple portions of the epider- 

 mis, on the dorsal surface only, are seen to be covered with a 

 number of small oval puncta or orifices ; and at the extremity 

 of the abdomen there are a good many larger orifices which are 

 nmltilocnlar ; all of these markings appear to be " spinnerets " 

 similar to those of Coccids, for from those at the extremity 

 proceed slender cottony threads forming the loose mass in 

 which the pupa) move. At the extremity of the abdomen the 

 elongate transverse ring (fig. 16) is slightly concave on the 

 anterior edge, and rather wide at the ends. 



Larvae active, gregarious, naked in loose masses of thin 

 meal and cottony threads; length about ^yn. General colour 

 and arrangement of the darker patches similar to those in the 

 pupge, but much lighter, the larva) having thus a generally 

 yellower appearance. Head broadly rounded in front and 

 rather deeply depressed. Antennae of four joints, the third 

 much the longest, the fourth bearing tw^o unequal spines. 

 Legs thick and fat ; tarsus very small and its joints hardly 

 to be made out ; there are two rather long tarsal digitules. 

 Several short hairs round the body-margin, and on the abdomen 

 some lanceolate spines. Anal ring as in the pupa, and at the 

 extremity of the abdomen many multilocular orifices, whence 

 issue slender cottony threads. 

 11 



