790 



COMPENDIUM OF GENERIC DISTINCTIONS. 



Genus. PHYLLIUM. Body flat, broad; front wings like 

 leaves ; legs provided with leaf-like appendages. Antennae 

 of male half length of body, those of female still shorter. East 

 Indies. 



Genus. BACTERIA. Wingless. Antennae haired ; larger 

 than head. East Indies. 



Section. SA L TA TORI A .Hind-legs for leaping. 



Family. ACHETID^E. Antennae very long and slender. 

 Wings large, forming, when rilled, a pair of projecting spines ; 

 wing-covers of male with talc-like spot at base. Both legs flat 

 on body. Jaws strong, with several sharp teeth. 



Genus. GRYLLOTALPA. Fore-legs broad and palmed. No 

 external ovipositor. 



Genus. ACHBTA. Fore-legs not palmed. Ovipositor pro- 

 jecting. 



Family. GRYLLID^E. Wings and covers forming a 



slanting roof. Ovipositor mostly flat and sabre-like. 



Genus. PHASGONURA. Wings and covers long. Ovi- 

 positor long and straight. Four short spines on end of ab- 

 domen. 



Family. LOCUSTID^E. No projecting ovipositor. An- 

 tennae short. 



Genus. LOCUSTA. Antennae simple. Wings and covers 

 large. 



Order. THYSANOPTERA. Wings four, similar, long, 

 narrow, not folded, lying along back. Mandibles like bristles. 

 Tarsi two-jointed. 



Order. NEUROPTERA. Wings four, large, equal. 

 Mandibles powerful. Ovipositor with several valves. 



Section. BIOMORPHO TIC A .Pupa active. 



Family. TERMITIDA;. Both sexes winged. Neuters 

 not winged. Body oblong, flat. Antennae short ; mandibles 

 flattened, toothed, triangular. Wings nearly twice as long as 

 body. 



Genus. TBRMBS. Labrum four-cleft; palpi three-jointed. 

 Tarsi four-jointed. Hot countries. 



Family. PERLID^E. Hinder wings very large and folded. 

 Tarsi three-jointed. 



Family. EPHEMERIDjE. Front wings very large. 

 Tarsi five- jointed. 



Genus. EPHEMERA. Wings four; three appendages to 

 abdomen. Head of larva horned. 



Family. LIBELLULID^E. Head large, globular ; abdo- 

 men long; thorax deep. Antennas very short. Mandibles 

 very powerful, and masked by lips. Appendages to abdomen 

 not jointed. 



Genus. LIBELLULA (including ICTINUS). Hinder angle of 

 second pair of wings rounded. Ocelli in a triangle. 



Genus. CAI.EPTERYX. Head transverse, hammer-shaped. 

 Cells of wings very numerous, dark spot hardly visible. 



Section. SUBNECROMORPHO TIC A .Pupa quiescent, 

 but becoming active just before last transformation. 



Family. PANORPID^E. Head lengthened into a beak. 

 Body long and slender. Legs long. Tarsi five-jointed ; two 

 purs on tibiae. 



Family. HEMEROBIIDjE. Body short and delicate. 

 Wings very broad and membranous. Head small ; eyes prom- 

 inent ; antennae long and delicate. 



Family. MYRMELEONID^. Body long and slender. 

 Head small ; no ocelli. Wings large and netted, with a strong 

 forked vein. Abdomen long. 



Genus. MYRMBLEO.N. Wings equal size. Hot countries. 



Genus. NBMOPTERA. Hind-wings very long and narrow. 

 Hot countries. 



Order. TRICHOPTERA. Wings four; front pair mostly 

 hairy, second pair large and folded when at rest. Long spines 

 at end of tibiae. Mouth not fitted for eating. Larva mostly 

 resident in sub-aquatic case. Pupa mostly inactive. 



Order. HYMENOPTERA. Wings four, transparent, 

 membranous; veins few, hinder pair smallest. Mandibles 

 powerful. Abdomen of female either with a saw or a sting. 

 Larva footless ; pupa inactive. 



Section. TEREBRANTIA. Abdomen of females fur- 

 nished with a boring instrument. No poison gland. 



Sub-section. PHYTIPHAGA. No footstalk to abdomen. 



Tribe. SERRIFERA .Boring instrument saw-like. 

 Family. TENTHREDINIDJE. As Tribe. 



Genus. CIMBBX. Club of antennae composed of two united 

 joints ; five joints preceding club. 



Genus. ATHAUA. Antenn* nine or ten-jointed, third 

 joint long; club indistinct. 



Genus. NBMATUS. Antenna: nine-jointed. Tarsi simple. 

 Family. UROCERID^E. Boring instrument awl-like. 



Genus. UROCERUS. Ovipostor long. Front of thorax not 

 forming a neck. Maxillary palpi very short. 



Sub-section. ENTOMOPHAGA. Abdomen with foot- 

 stalk. 



Tribe. SPICULIFERA. Ovipositor needle-like. Abdo- 

 men not tubular at tip. 



Family. CYNIPID./E. Ovipositor interior, nearly spiral. 

 Antennas straight. 



Genus. CYNIPS. Abbomen nearly egg-shaped. Antennae of 

 male fifteen-jointed, of female fourteen-jointed. Wings large. 



Family. ICHNEUMONIDjE. Abdomen attached to end 

 of thorax. Ovipositor and antennae straight, latter mostly 

 more than sixteen joints. 



Genus. ICHNEUMON. Abdomen long and egg-shaped, first 

 segment rough. Ovipositor not protruding. Antennae simple. 

 Outer cell of front wings complete. 



Genus. RHYSSA. Abdomen long, convex, and shining. 

 Faint wrinkles across thorax. Ovipositor very long. 



Genus. MICROGASTBR. Abdomen very small. Eyes hairy. 

 Antennae eighteen-jointed. 



Tribe. TUBULIFERA.AbAomtn telescopic and re- 

 tractile at tip. Antennae elbowed. 



Family. CHRYSIDID^E. As Tribe. 



Section. A CULEA TA . Ovipositor modified into sting, 

 with poison-glands. Sting defended by two-bladed sheath. 



Sub-section. INSECTIVORA. Front wings not folded. 

 Larva solitary. 



Family. CRABRONID^E. Head long and squared. 

 Mandibles narrow. No elongated beak. Front tibias with a 

 combed spur. 



Genus. CRABRO. Face very wide. Antennae strongly 

 elbowed. Mandibles two, cleft at tip. Maxillary palpi with 

 six joints, labial with four. 



Genus. PHILANTHUS. Abdomen long long and rather egg- 

 shaped. Cell on edge of front wings very narrow and pointed. 



Family. BEMBECIDjE. Head transverse, eyes extend- 

 ing to hinder edge. Mandibles sharp, with one tooth inside. 

 End lobe of maxillae long. Tongue mostly long. 



Genus. MONEDULA. Body long, pointed at tip. An- 

 tennae set in middle of face. Tarsi with short spines. Males 

 with one or two spines in tubercles, on under surface of ab- 

 domen. 



Family. SPHEGID.*.- Collar large, extending to base of 

 wings. Legs very long, and formed for digging. Antennae 

 slender, often curled in females. 



Genus. POMPILUS. Thorax oblong. Antennas inserted 

 near mouth. Sting not protruding. 



Genus. CHLORION. Head as wide as thorax. Mandibles 

 toothed inside. Abdomen on footstalk. Third ring of thorax 

 transversely streaked. Hot countries. 



Family. SCOLIID^E. Collar extending to base of wings. 

 Legs short and stout. Antenna; mostly short and thick. 

 Both sexes winged. 



Genus. Scot-iA. Antennae short and curled. Legs with 

 thick spines. Labium composed of three parts set in a line. 

 Hot countries. 



Family. MUTILLIDiE. Females wingless. First and 

 third joints of antenna; long. Mandibles notched. Sting very 

 long. 



Genus. MUTILLA. Antennae set above front edge of shield. 

 Thorax not divided. Hot countries. 



Sub-section. SODALES. Front wings not folded. Larva 

 social. 



Family. FORMICIDjE. Females much larger than 

 males. Both sexes winged; neuters wingless. Basal joint of 

 antennae long ; elbow sharp. Eyes not reaching to hinder edge 

 of head. 



