COMPENDIUM OF GENERIC DISTINCTIONS. 



7 '.if, 



Gemu. PTEUOPIIOIIUS. Front-wings two-lobed, hinder 

 three-lobed. 

 Geniis. ALUCITA. Both pairs of wings six-lobed. 



Order. H O MO PTERA Wings fonr, membranous; 

 front pair larger than hinder, not overlapping. Tarsi not 

 more than three joints. Body convex. 



Section. TRIM ERA. Tarsi with three joints. Antemne 

 very small. Wings with definite ceDs. 



Family. CICADID.33. Head short and broad ; eyes large 

 and prominent. Three ocelli, placed in a triangle on back of 

 head. Beak long and three-jointed. Legs not for leaping. 

 Males with drums at base of abdomen. Females with ovi- 

 positor of two saw-edged blades. 



Genus. CICADA. Antennae seven-jointed. 



Family. FTJLGORID.33. Antennae three -j ointed ; ocelli 

 two, placed beneath eyes. Legb mostly for leaping. Males 

 without drums. 



Genus. HOTINUS. All wings variegated. Head elongated 

 into a long process, slightly curved upwards. Exotic. 



Genus. POECILOPTERA. Hinder wings not variegated. 

 Head not elongated. Ocelli wanting. 



Family. CERCOPID^!. Antennas three-jointed, last 

 joint forming a long bristle, set between eyes. Ocelli two. 

 Legs for leaping. No drum in male. 



Genus. CERCOPIS. Head small. Ocelli apart, set on upper 

 side of head. 



Genus. APHROPHORA. Head moderate. Ocelli close 

 together, on crown of head. 



Genus. BOCYBIUM. Prothorax developed into a curious 

 arrangement, consisting of a footstalk, with a branch back- 

 wards and a cross-bar in front, bearing four knobs, two cen- 

 tra], on short footstalks. Brazil. 



Genus. TETTIGONIA. Distance between ocelli and ocelli 

 and eyes equal. 



Section. DIMERA. Tarsi two-jointed. Wings partly 

 with cells. Antennas moderate. 



Family. APHID^G. Antennae seven-jointed. Wings 

 numerously veined. Beak four-jointed. Ocelli three, in a 

 triangle. Front wings largest. 



Genus. APHIS. Abdomen with two projections. An- 

 tennas long, hair-like. Proboscis short. 



Section. MONOMERA. Tarsi one-jointed. Wings 

 not celled. Antennae from six to twenty-five joints. 



Family. COCCID.ffi. As Section. 



Genus. Coccus. Male winged ; abdomen with two long 

 filaments at side and shorter appendage in middle. Females 

 gall-like, fixed. 



Order. HETEROPTERA. Wings four, front pair 

 largest, partly overlapping. Basal part leathery, rest mem- 

 branous. Body flattened. 



Section. HYDROCOR ISA. Aquatic. Legs for 

 swimming. Fore-legs short and folding, for prehension. 

 Antennae very short, hidden in furrows under eyes. 



Family. NOTONECTID/E. Hind-legs long, fringed, and 

 oar-like. Body boat-shaped. Beak short, sharp, and thick. 



Genus. NOTONECTA. Body oval, cylindrical. Front tarsi 

 three-jointed. 



Family. NEPID^I. Front legs strongly raptorial ; tibia 

 united to tarsus. Body very flat. 



Genus. NEPA. Body broad. Two bristles at end of 

 abdomen. 



Section. AU ROC OR ISA. Antennae long, not con- 

 cealed. Legs for running, not for swimming. 



Family. HYDROMETBID^. Body long, narrow. An- 

 tennae four-jointed. 



Genus. GERRIS. Basal joint of antennae largest. Four 

 hind-legs very long, two fore-legs distant from hind limbs. 



Genus. DIACTOR. Joints of antennas of equal length. 

 Hind pair of legs with large flattened plates. Brazil. 



Family. EEDUVIID^i. Beak short, thick, and naked. 

 Head-narrowed behind into neck. Ocelli two. Tarsi three- 

 jointed. 



Genv;. ARILUS. Prothorax elevated and notched like a 

 cog-wheel. West Indies. 



Genus. HAMMATOCERUS. Second joint of antennae com- 

 posed of great number of minute joints. 



Genus. DALADER. Abdomen flat, wide. Third joint of 

 antennae flattened and leaf-like. Thorax expanded. India. 



Family. CIMICID.ffi. Wingless. Antennae four-jointed. 

 Abdomen very flat and rounded. Tarsi three-jointed. 



Genus. CIMEX. As Family. 



Famil;/. TINGID.ffi. Small. Body broad and flat. Beak 

 three-jointed, received into groove on under side of bead. 



Family. CAPSID.SC. Body convex, soft ; second joint of 

 antennae often thickened at tip. Females with long, sabre- 

 >haped ovipositor. 



Genus. MIRIS. Long, narrow. Antennae very long, 

 second joint largest, first joint thickest. No ocelli. 



Family. LYG.2EID./E. Small. Antennas four-jointed. 

 Tarsi three-jointed, with two cushions between claws. 



Family. COREID./E. Large. Antennas four-jointed, end 

 joint large, thick, or long. Ocelli near each other. Beak 

 four-jointed, moderate. 



Family. SCUTE LLARID^l. Beak four-jointed, long. 

 Antennas often five-jointed, last joint like others. Scutellum 

 large. 



Genus. EDESSA. Thorax very wide, produced into a long 

 shai-p point on each side. 



Genus. SCUTELLARIA. Scutellum very long, reaching 

 almost to extremity of abdomen. 



Order. APHANIPTERA Wings four, very minute, 

 like scaly plates on sides of thorax. Antennas minute. 

 Mouth for suction ; tarsi five-jointed. 



Family. PT7LICID.ffi. As Order. 



Genus. PUI.EX. Labial palpi jointed. 



Order. DIPTERA. Wings two, membranous, not 

 folded. A pair of winglets at base, second pair of wings re- 

 placed by balancers. Mouth for sucking. Tarsi five-jointed. 



Section. C EPHALOTA. Head distinct from thorax. 

 Claws of tarsi not toothed. 



Stirps. NEMOCERA . Antennas more than six joints ; 

 palpi with four or five joints. 



Family. CULICID^]. Very long beak, rather thick at 

 tip, composed of seven pieces. Head small. Antenna) 

 plumed in male. 



Genus. CULEX. Palpi of male larger than thorax, very 

 short in female. 



Family. TIPTJLIVJE. Proboscis veiy short. Palpi 

 larger than proboscis, four-jointed. 



Genus. TIPULA. Antennae larger than head, not plumed, 

 thirteen-jointed. Last joint of palpi moderately long. Seven 

 cells at end of wings. 



Section. BRAG HOC ERA. Antennae very short. 

 Paipi vr : tb ere or two joints. 



Stirps. NOTACAJrTffA.AntennsB apparently three- 

 jointed, last joint articulated. 



Family. TABINID.ffi. Mouth with six lancets in female, 

 four in male. Maxillary palpi two-jointed. Eyes very large. 



Genus. TABANDS. Antennas seven-jointed, not longer 

 than head. 



Genus. GLOSSINA. Mouth with exserted proboscis, 

 furnished with poison-gland at base. Thorax much longer 

 than wide. South Africa. 



Stirps. A THERICERA . A ntennas two or three joints, 

 bristle at tip. 



Family. SYEPHID55. Proboscis with four internal pieces. 



Genus. ERISTALIS. Body stout and hairy ; fourth longi- 

 tudinal nervure of wing much curved before tip. Eyes of 

 male touching each other. Bristles of antennas naked or haired . 



Family. MUSCID-flC. Proboscis enclosing two pieces, 

 short, thick, and membranous. Antennas three-jointed, 

 third largest. Nervures of winga few. 



Family. (ESTRID.33. No visible mouth, or only minute 

 tubercles. Antennae very short. 



Genus. OESTRUS. Nervures not extending to hinder edge 

 of wings. 



Stirps. PUPIPARA.Head sunk in thorax. Claws 

 toothed. 



Family. HIPPOBOSCID^E. Head distinct. Legs short, 

 stout, fifth joint of tarsi largest. 



Genus. HlPPOBOsc.v. Wings ample. Nervures not ex- 

 tending to tip. 



