NEUROPTERA. PSOCIDA — LIBELLULIDE. 47 
LACHESILLA Westw. Arrovos p. Leach. 1 sp. T. fatidicwm Linn. 
Head transverse; tarsi 2-jointed; wings Oin 9, 2 short in g ; legs slender. 
My fig. 59. 16. 
Family 3. PERLIDZ Leach, (Perlarie p. Latr.) 
PERLA Geoff Sremsuis p. Fabr. 4 sp. Phryg. bicaudata Linn. Curt. 190. 
Abdomen robust ; bisetigerous; wings ¢ abbreviated. 
ISOGENUS Newm. ———— 1 sp. IL. nubecula Newm. Steph. 6. pl. 31. f. 2. 
Abdomen robust, bisetigerous; wings alike in both sexes. 
CHLOROPERLA Newm. Perrua p. Latr. 6'sp. PP. lutea Latr. 
Abdomen slender ; wings alike in both sexes ; nerves fewer than in Isogenus. 
NEMOURA Latr. Sempuis p. Fabr. 14 sp. P.nebulosa Linn. 
Abdomen not setigerous ; antennz slender, setaceous. Steph. 6. pl. 31. f. 3. 
LEUCTRA Steph. Nemoura p. Steph. 3 sp. L. geniculata St. St. 6. pl. 31. f. 4. 
Abdomen not setigerous ; antenne more robust, submoniliform ; wings elongated, 
acuminated. 
Family 4. EPHEMERIDZ Leach. (Ephemerine Latr.) 
EPHEMERA Linn. Eruemera A. Steph. 6 sp. E.vulgata Linn. Curt. 708. 
Wings four ; three anal filaments; head of larva cornuted. 
LEPTOPHLEBIA Westw. Ernemera B. Steph. 10sp. £. vespertina De G. 
Wings four; three anal filaments ; head of larva unarmed. (2. pl. 17. f. 15.) 
BAETIS Leach. Evuemera p. Linn. 23 sp. Eph. bioculata Linn. 
Wings four ; abdomen with two terminal filaments. St. 6. pl. 29. f. 2. 
BRACHYCERCUS Curt. Eruremera p. Fabr, 5 sp. Eph. brevicauda Fab. 
Wings two; abdomen with three filaments scarcely longer than the body. Har- 
ris, Exp. pl. 6. f. 3. 
CQENIS Steph. — 2sp. C.macrura. St. 6. pl. 29. f. 1. 
Wings two; abdomen with three filaments several times longer than the body. 
CLOEON Leach. Eruemera p. Linn. 10sp. Eph. diptera Linn. 
Wings two; posterior pair obsolete; abdomen with two sete. St. 6. pl. 29. f. 3. 

Family 5. LIBELLULIDE Westw. (Libellulina MacL.) 
Subfamily 1. Libellulides Westw. (Libellulidxw Leach.) 
ANAX Leach. Lisettutra p. V. L. sp. An. formosa V. L. 
Ocelli in a row ; eyes contiguous; wings acuminated; anal angle of posterior pair 
rounded. 
ZESHNA Fabr. Lisetiura p. Linn. 7 sp. L. grandis Linn. Donoy. 337, f. 2. 
Ocelli in a row; eyes contiguous; wings obtuse; anal angles of posterior pair 
more or less angulated in g. 
CORDULEGASTER Leack. Lisettuxa p. Linn. 1 sp. 42. annulata Latr. 
Ocelli in a row ; abdomen clavate ; anal angle of posterior wings strongly angu- 
lated. Donoy. 4. 30. 
GOMPHUS Leach. Lizettura p. Linn. 2 sp, L. vulgatissima Linn. Donovy. 423. 
Ocelli in a line ; eyes remote in both sexes ; abdomen clavate. 
CORDULIA Leach, Liperxuta p. Linn. 3sp. L.enea Linn. Curt. 616. 
Ocelli in a triangle, metallic-coloured ; anal angle of posterior wings angulated 
in ¢. 
