I'oMoNA College Joirnal of Entomoixxjv 771 



Wings 



Held horizontally in rpst. Veins Never hold horizontally. Costal 



pale. (Thomas.) dark, first, seeond and base of third 



diseoidals dark and narrowly elondi'd. 

 Sti^rma Miint at apex. (Thomas.) Stigma acute at apex. 



Legs 



All whitish exeept last joint of the Coxa' and all hut apex of femora 



tarsi of winged individuals. (Will- yellow, tihia and tarsi dark through- 

 iams.) out. 



Named after the si)ecies of the Host Plant Jurjlnns caUfornira Wats. 



Tribe LACHNINI 



liod)i — I'sually lari;i', hairy, tlattcui'd. widest ,iust in front of the eornieles. 



Antfuuai — Short, .seareely lonfrer than half the lensrth of the hody. not 

 on frontal fuhereles; six artieled exeept Essi^ella. whieli has hut five; rather 

 slender; hairy; artiele TH lon'.rest. usually as lonpr as TV and V together. 



Legs — First and seeond pairs rathi-r .short; third pair exeeptionally long; 

 stout ; hai ry. 



Wing Vf nation — Primary wings with eostal. suheiistal. stigma!, and three 

 diseoidals. the third being twiee forked. The first and seeond diseoidnls with 

 bases often very elose together. Third <li.seoiilal sometimes very faint. Stigma 

 usually Innsr and slender. Stigmal vein nearly always straight, but may be 

 slightly curved. Seeondar.v wing with subcostal and two diseoidals. 



Cnrnirlrs — Very short; conical: ring or poredike or entirely obscure or 

 wanting; base usually as wide as the length. 



Sti/Ir — H^iunded ; ineonspicuo>is ; or obsolete. 



Of all the tribes in this family. perha|is there are none more difficult or 

 obscure than the one under consideration. Wilson, in the Annals of the En- 

 tomological Society of Anieri<'a. Vol. TV, pp. :il-54. has made the first advance 

 in bringing the various genera and their synonyms together, losing this as a 

 basis, T have attempted to fornndate, though in a ver.v rude way, a key to 

 these known genera. This has been especially difficult, because of the fact that 

 most of the types as well as the genera and many of the known species have 

 been described in Europe and have received little or no attention from Ameri- 

 can writers. Tt ha.s been neces.sar.v to select characters as they arc given in the 

 original descriptions, and niany of these arc not fit nuitcrial for formulating a 

 key. My chief aim in so doing is to get the key before the public and asking 

 all to join in its revision and correction. Tt is to be understood then that the 

 fcllowinvr is but provisional: 



Provisional Key to Genera 



1. Antenna^ with five articles. 8 



Antenna' with six articles. 2 



