40 NEW YORK STATE MUSEUM 



Description. Length about 1/20 of an inch, yellowish or 

 greenish and with yellowish or dark brown markings as follows: 

 Submedian triangles on the pronotuni ; submedian and sublateral 

 longitudinal stripes on the mesonotum and most of the metanotum. 

 Antennae long, slender, yellowish or greenish, the first segment 

 short, obconic, the second stout, cylindric, the third slender, fully 

 three times the length of the second, the fourth less than ^ the 

 length of the third and rather closely united with the somewhat 

 longer fifth, the sixth, seventh, eighth and ninth, each subequal and 

 about as long as the fifth, the tenth about ^ the length of the 

 ninth, the eleventh reduced, ^ the length of the tenth and apically 

 with stout spines, the ninth and tenth distally and the eleventh some- 

 what enlarged ; eyes reddish. Fore wings mostly hyaline, variably 

 fuscous along the anterior margin, near the distal third, in the region 

 of the distal fourth and apically (pi. 16, fig. i). The legs are a vari- 

 able yellowish or green, the tarsi (pi. 16, fig. 6) being somewhat 

 darker. The abdomen is yellowish or greenish with variable fuscous 

 markings. The male of this species is remarkable because of the 

 greatly developed genitalia projecting dorsally. The anterior organ 

 is subtriangular and with a length about equal to half the width of 

 the wing, while the posterior organ is irregularly subquadrate, 

 stemmed and fuscous. A view of the extremity of the male abdo- 

 men is given on plate 16, figure 3. The female has somewhat the 

 same general appearance as the opposite sex, being easily distin- 

 guished therefrom by the abdomen tapering to a subacute apex, 

 bearing the ovipositor and secondary sexual organs (pi. 16, fig. 4). 



The nymphs or young have the dorsum of the head mostly 

 fuscous, the wing pads brown, the anterior abdominal segments 

 greenish, the posterior fuscous and ornamented with a waxy secre- 

 tion, the latter being produced at the lateral and posterior angles as 

 long, waxy threads. The antennae are yellowish green, the basal 

 and distal segments fuscous. The legs are yellowish green, the tarsi 

 fuscous. 



Life history. This species appears to have about the same 

 life cycle as the pear Psylla, the adults wintering on the bark of the 

 tree and the insects becoming abtmdant in June. 



Control measures. It is probable that this pest could be 

 controlled where circumstances warranted, by scraping the bark and 

 spraying thoroughly in early spring with a contact insecticide, such 

 as a lime-sulfur wash, a kerosene or petroleum emulsion, a strong 

 whale oil soap solution or a tobacco extract for the purpose of 

 destroying the hibernating Psyllids. 



Bibliography 



1876 Low, Franz. Verhandl. k.-k. zool.-bot. Gesel., Wien. 26:216 (Psylla). 



1877 Verhandl. k.-k. zool.-bot. Gesel., Wien. 27:138 (Psylla). 



1878 Verhandl. k.-k. zool.-bot. Gesel., Wien. 28:587-88. 



1882 Wien. Ent. Zeitimg. 1:211. 



1899 Smith, J. B. Insects of N. J., p. 98. 





