OF WASHINGTON, VOLUME XV, 1913. 61 



Ion, the Philippines, etc. Another Jassid injuring rice in India is 

 Tettigoniella spectra Dist. Three species of Idiocerus injure the 

 shoots of mango in Saharanpur, namely, /. dypealis Leth., I. 

 niveosparsus Leth. and /. atkinsoni Leth. Chloritia (Eupteryx) 

 solani Kollar is the potato frog fly of England, as stated by Miss 

 Omerod. Thamnotettix fuscovenosus Ferr. occurs in Italy, Corsica, 

 Greece, Austria, etc., and in some regions injures the olive. 

 Typhlocyba viticola Targ. injures the grape in Italy, as does flaves- 

 cens in northern Africa. In Bohemia several species of Jassids 

 injure the sugar beei, as Cicadula sexnotata Fall., Eupteryx atro- 

 punctata Goeze, etc. Zygina subrufa Motsch., Deltocephalus dor- 

 salis Motsch. and Strongylocephalus agrestis Fall, attack rice and 

 sugar cane in Formosa, the latter species injuring the same crops 

 in Japan. 



Fidgoridce. 



A notorious species in this family is Perkinsiella saccharicida 

 Kirk., the sugar-cane leafhopper, which, on account of its injuries, 

 led to the establishment in Hawaii of the Entomological Division of 

 the Sugar Planters' Experiment Station. The pest is thought to 

 have been introduced from Australia, and is known to occur in 

 Java. Several other species injure sugar cane, as Phenice moesta 

 Westw. and Pijrilla aberrans Walk., in India, and Delphax sac- 

 charivora West., which some years ago was troublesome in the 

 West Indies. Liburnia (Delphax) psylloides Leth. injures corn 

 in Ceylon and India. Ricania zebra Dist., in the same region, in- 

 fests rice and grasses. 



Hysteropterum grylloides Fabr. infests the olive, in Italy, and is 

 general over all of southern Europe. Another European form is 

 Hyalesthes obsoletus Sign, injuring young olives. Dictyophora 

 pallida Dor. is the sugar cane fly of India, and is common in the 

 Punjab, United Provinces, and Behar. Cane is said to be its only 

 food plant. 



Psyllidce. 



The injurious members of this family are mostly of the genus 

 Psylla, and numerous forms of decidedly economic importance 

 occur in the Palearctic region. Thus, Psylla mali Schmidbg. 

 ranges pretty well over Europe, and is a decided pest of apples. 

 In England it is known as the apple sucker, where it is considered 

 one of the worst of all pests to this plant. P. cratcegi Schr. occurs 

 over Europe generally on apples and Cratcegus. P. pruni Scop, 

 is also distributed over much of Europe, including Siberia. It 

 attacks plum and prunes. P. pyri L. occurs on pear and has about 

 the same distribution as the foregoing. P. pyrisuga Forst., also 

 attacking pear, occurs over much of Continental Europe, and is 



