296 ^^6 Philippine Jownal of Science i9i8 



KEYS TO THE SUBFAMILIES, TRIBES, AND GENERA OF THE ITONIDID-ffi 



ITONIDID^ 



Key to the subfamilies and the tribes. 



a'. Metatarsus longer than the following segment; 5 tarsal segments; wings 

 with at least 4 long veins; cross vein usually present. 



Subfamily lestremiiiiBe, p. 296. 



6\ Fourth vein forked Tribe lestremiinarise, p. 296. 



6'. Fourth vein simple Tribe Campylomyzariae, p. 297. 



a^ Metatarsus longer or shorter than the following segment; wings with 

 not more than 3 long veins; cross vein and circumfila wanting. 



Subfamily Heteropezinse, p. 299. 



a". Metatarsus always shorter than the following segments; wings with 



3 or 4 long veins; circimifila present.... Subfamily Itonididinse, p. 300. 



6\ A distinct cross vein uniting the third vein and subcosta and usually 



parallel with costa Tribe Porricondylarise, p. 300. 



6'. No distinct cross vein uniting the third vein with subcosta. 

 c*. Costa thickly scaled; the third vein usually very close to the an- 

 terior margins of the wings; antennal segments sessile, cylindric, 



short, never produced Tribe lasiopteriariae, p. 302. 



c'. Costa rarely thickly clothed with scales, the third vein well se- 

 parated therefrom; antennal segments usually with a length 

 greater than their diameter. 

 <r. Flagellate antennal segments cylindric, never binodose in the 

 male. 



e\ Claws toothed Tribe Dasyneuriariae, p. 303. 



e'. Claws simple. 



/'. Flagellate antennal segments cylindric or subcylindric, not 

 gi-eatly elongated, usually stalked in the male; ovipositor 



not aciculate Tribe Oligotrophiariae, p. 305. 



f. Flagellate antennal segments cylindric, elongate, sessile; 

 ovipositor usually aciculate.... Tribe Asphondyliariae, p. 308. 

 d*. Flagellate antennal segments of the male greatly produced, bino- 

 dose; circumfila usually forming long loops. 



Tribe Itonididinariae, p. 309. 



LESTREMIINy^ 



LESTREMIINARIye 



Key to the genera.* 



a\ Antennae at least moderately developed, with 11 to 16 segments, the 

 second not greatly enlarged. 

 b'. Costa continuous and extending beyond the apex of the wing. 



Catocha Hal. 

 b'. Costa not attaining the apex of the wing, practically disappearing 



at its union with the third vein Lestremia Macq. 



a,'. Antennae greatly reduced, only 8 to 10 or 11 segments. 



6\ Second antennal segment greatly enlarged; flagellate segments very 

 short. 



♦Revised from B^dl. N. Y. State Mus. (1913), No. 165, 129. 



