Maskell. — On PsyllidiD in New Zealand. IGo 



transverse bands of brown; genitalia dark -brown, almost 

 black ; wings hyaline, colourless. Viewed ventrally, the 

 general colour is "yellow, with patches of light-brown. Legs 

 yellow; antennae brown. Head broader than long, depressed 

 in front and produced beneath into two moderately long conical 

 processes. Ocelli two, close to the eyes. Eostrum cylindro- 

 conical, black at the tip ; setae short. Forewings elongate, 

 slightly apiculate ; costal margin regularly convex, dorsal 

 margin shghtly concave ; prhnary stalk of veins (fig. 2, ah) 

 one-fourth the length of the whole wing; stalk of the sub- 

 costa (fig. 2, bd) one-third as long as the primary stalk ; radius 

 {df) convex in its middle part towards the costal margin, and 

 reaching the costal vein at rather more than five-sixths of the 

 length of the wing; cubitus forking directly from the sub- 

 costa, its upper main branch convex and forking a little before 

 reaching the margin ; the upper secondary branch joining the 

 costal vein a little above the apex ; the lower main branch 

 forking close to the middle of the dorsal margin, with one 

 short and one long and very convex secondary branches ; in 

 the areas formed by the branches of the cubitus are three 

 short markings springing from the costal vein and having the 

 appearance of nervelets, but which on close examination are 

 seen to be composed of a number of minute oval spots (tig. 3) ; 

 on all the veins of the wing are some very short fine hairs ; 

 but there are no puncta on the surface. Hindwings with the 

 anterior margin somewhat straight, but a little convex at 

 nearly half its length ; posterior margin deeply and regularly 

 convex ; ends rounded ; a single vein runs along almost half 

 the anterior margin, and there are three other exceedingly fine 

 and delicate longitudinal veins, of which the anterior is slightly- 

 concave to the anterior margin , which it joins rather above the 

 apex ; the second, also concave, joins the margin below the 

 apex ; the third forks near the middle of the posterior margin, 

 with one short and one long branch ; the whole hindwing is 

 sparsely but clearly punctate. Antennae of ten joints — the 

 first two short, thick, and smooth, the rest slender and nume- 

 rously ringed ; the third joint is the longest, the fourth, fifth, 

 sixth, and seventh subequal and nearly half as long as the 

 third ; the last three subequal, a little more than half as long 

 as the fourth, the last joint slightly dilated and bearing two 

 unequal spines. Legs slender ; tarsi dimerous ; claw double ; 

 there are a few short spines at the tip of the tibia. Genitalia 

 bivalve ; viewed sideways the lower valve is rather longer than 

 the upper ; both are rather sharply pointed, and bear several 

 hairs. 



Adult male similar to the female, but in most cases much 

 lighter in colour, having a generally yellow appearance. 

 Genitaha consisting of a genital plate (tig. 9, a) which has two 



