cally under the author's name. This method of citation eliminates 

 the necessity for a complete literature citation in the catalogue 

 proper, and thus saves time, space, and publication costs. It is 

 believed that the revised method will cause no great inconvenience 

 to the reader. Dr. Metcalf himself advocated it under certain con- 

 ditions, and it is felt that he would have approved its use for his 

 catalogues. 



The Family Cicadellidae [Typhlocybinae sens. Young] consists 

 of 93 genera, 31 subgenera, and 1,763 species. The leaf hoppers be- 

 longing to this family are usually of small size (2-4 mm. in length) 

 and occasionally beautifully colored. On the head, ocelli are usually 

 absent, the antennal ledges are not distinct, the sulci of the face are 

 often weak, the clypeus and clypellus are not tumid, and the lateral 

 clypeal sulci usually extend dorsad beyond the antennal pits. In the 

 forewings, which are usually lightly sclerotized, the clavus usually 

 has a single vein or none, crossveins are lacking before the apical 

 series, the longitudinal veins are usually indistinct basally, and the 

 appendix is often absent. The venation of the hindwings is re- 

 duced. The hind femoral setal formula is 2:1:1. This is a very 

 large family, perhaps the largest of the Cicadelloidea, when both 

 described and undescribed species are taken into account. 

 The following classification has been adopted for this family : 



Page 



Family Cicadellidae 1 



Subfamily Alebrinae 18 



Subfamily Cicadellinae 100 



Tribe Dikraneurini 100 



Tribe Empoascini 286 



Tribe Jorumini 599 



Tribe HeHonini 611 



Tribe Cicadellini 613 



Tribe Typhlocybini 780 



Tribe Erythroneurini 1049 



The species have been recorded from the following zoogeograph- 

 ical regions : 749 from the Nearctic Region, 233 from the Carib- 

 bean Region, 106 from the Neotropical Region, 411 from the 

 Palearctic Region, 38 from the Ethiopian Region, 75 from the 

 Oriental Region, 33 from the Malaysian Region, 27 from the 

 Australian Region, 3 from the Maorian Region, 18 from the 

 Oceanic Region, 68 from two or more regions, and 2 from un- 

 known localities. 



The known geographic distribution of each species is indicated 

 by superscript figures at the end of the lines, which correspond to 

 geographic regions designated by the same superscript figures. 

 In general, the distribution is as given by the author of the ref- 



VI 



