COMPEXDllU OF GENERIC DISTINCTIONS. 



i ;-. M ) 



Family. EPHEMERIDiE.— Front wings very large. Tarsi 

 five- jointed. 



Genus. Ephemera. — Wings four; three appendages to abdo- 

 men. Head of larva horned. 



Family. LIBELLULIDiE. — Head large, globular; abdomen 

 long; thorax deep. Antennae very short. Mandibles very 

 powerful, and masked by lips. Appendages to abdomen not 

 jointed. 



Genus. Lirellula (including Ictinus). — Hinder angle of 

 second pair of wings rounded. Ocelli in a triangle. 



Genus. Calepteryx. — Head transverse, hammer-shaped. 

 Cells of wings very numerous, dark spot hardly visible. 



Secthm. SUBNECROMORPHOTICA.-Pnp* 1«- 



escent, but becoming active just before last transformation. 



Family. PANORPIDJE. -Head lengthened into a beak. Body 

 long and slender. Legs long. Tarsi five-jointed; two spurs on 

 tibia?. 



Family. HEMEROBIIDJE.— Body short and delicate. Wings 

 very broad and membranous. Head small; eyes prominent; 

 antennae long and delicate. 



Family. MYRMELEONIDJE. — Body long and slender. Head 

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

 vein. Abdomen long. 



Genus. Myrmeleon. — Wings equal size. Hot countries. 



Genus. Nemoptera. — 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, mem- 

 branous; veins few, hinder pair smallest. Mandibles powerful. 

 Abdomen of female either with a saw or a sting. Larva foot- 

 less; pupa inactive. 



Section. TEREBRANTI A. -Abdomen of females fur- 

 nished with a boring instrument. No poison gland. 



Sub-section. Piiytiphaga. — No footstalk to abdomen. 



Tribe. SERBIFEBA.— Boring instrument saw-like. 



Family. TENTHREDINID^.— As tribe. 



Genus. Cimeex. — Club of antennae composed of two united 

 joints; live joints preceding club. 



Genus. Ath alia. — Antennae nine or ten-jointed, third joint 

 long; club indistinct. 



Genus. Nematus — Antennae nine-jointed. Tarsi simple. 



Family. UROCERIDi;.— Boring instrument awl-like. 



Genus. Ubocekhs. — Ovipositor long. Front of thorax not 

 forming a neck. Maxillary palpi very short. 



Sub section. Eiitomophaga. — Abdomen with footstalk. 



Tribe. SPICULIFFffiA.—Ovrpositoi needle-like. Abdomen 

 not tubular at tip. 



Family. CYNIPIDiE. — Ovipositor interior, nearly spiral. 

 Antennae straight. 



Genus. Cymps. — Abdomen nearly egg-shaped. Antennae of 

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



Family. lCHNEUMONIDiE. -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. 

 ( Inter cell of front wings complete. 



Genus. Rhyssa. — Abdomen long, convex, and shining. 

 Faint wrinkles across thorax. Oviposit >r very long. 



Genus. Microoaster.— -Abdomen very small. Eyes hairy. 

 Antennae eighteen-jointed. 



Tribe. TUBULIFEKA.— Abdomen telescopic and retractile 

 at tip. Antennas elbowed. 



Family. CHRYSIDID.ZE.— As Tribe. 



Section. ACULEATA — Ovipositor modified into sting, 

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



Sub-section. Insectivora. — Front wings not folded. Larva 

 soli tan'. 



Family. CRABS0NID.5.— Head long and squared. Mandi- 

 bles narrow. No elongated beak. Front tibiae with a combed 

 spur. 



Genus. Graisro. — Face very wide. Antennas strongly el- 

 bowed. Mandibles two, cleft at tip. Maxillary palpi with six 

 joints, labial with four. 



Genus. riin.Avriirs. — Abdomen long and rather egg-shaped. 

 Cell on edge of front wings very narrow and pointed. 



Family. BEMBECIDiE.— Head transverse, eves extending to 

 hinder edge. Mandibles sharp, with one tooth inside. End 

 lobe of maxillae long. Tongue mostly long. 



Genus. Moxedola. — Body long, pointed at tip. Antenna' 

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

 or two spines in tubercles, on under surface of abdomen. 



Family. SPHEGID^.— Collar large, extending to base of 

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

 slender, often curled in females. 



Genus. Pompii.us. — Thorax oblong. Antennae inserted near 

 mouth. Sting not protruding. 



Genus. Chlouion. — Head as wide as thorax. Mandibles 

 toothed inside. Abdomen on footstalk. Third ring of thorax 

 transversely streaked. Hot countries. 



Family. SCOLIIDiE.— Collar extending to base of wings. 

 Legs short, and stout. Antennae mostly short and thick. Both 

 sexes winged. 



Genus. Scolia. — Antennae short and curled. Legs with 

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

 Hot countries. 



Family. MUTILLID5;.— Females wingless. First and third 

 joints of antennae 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. FORMICIDiE.— 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. 



Genus. Formica. — Sting absent. Eyes distinct. 



Genus. Poxera. — Sting large. Eyes of neuter wanting. 



Genus. Myrmecia. — Sting present. Basal joint of antennae 

 long. Footstalk of abdomen two-jointed. 



Sub-section. Diplopteryga. — Front wings folded. 



Family. EUMENIDiE.— Solitary. No neuters. Mandibles 

 rather long. End joints of antennae often hooked in males. 

 Thorax short. Abdomen sometimes on footstalk. Legs not 

 spined. 



Genus. Eumenes. — Basal segment of abdomen narrow, and 

 forming a footstalk. 



Genus. OiiVNERiis. — Basal segment of abdomen short, rather 

 j bell-shaped. Abdomen rather conic. 



Family. VESPID*.— Shield of head nearly square. Mandi- 

 bles short, toothed at the tips. Antennae twelve-jointed in fe- 

 males and neuters; thirteen-jointed in males. 



Genus. Vespa. — Abdomen egg-shaped. Mandibles oblique 

 at tip. 



Sub-section. Mellifera. — Basal joint of last tarsi formed into a 

 spoon-like plate. Proboscis mostly present. One spur on each 

 of two front pairs of tibiae. 



Family. APIDiE.— Proboscis long. Basal joint of antenna; 

 long. 



Genus. Nomada. — Body long. Marginal cell broad. Maxil- 

 lary palpi six-jointed. 



