<;;;■.' 



COMPENDIUM OF GENERIC DISTINCTIONS. 



Family. NEPIDJE.— Front legs strongly raptorial; tibia 

 united to tarsus. Body very flat. 



Genus. N'epa. — Body broad. Two bristles at eud of abdomen. 



Section. AUROCOR1SA. Antenna long, not con 

 eealed. Legs for running, n« . t for fn innning. 



Family. HYDROMETRIDJE. -iiu.lv long, narrow. Antennae 

 four-jointed. 



Genus. Gerris. — Basal joint of antennae largest. Four hind- 

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



Genus. Diactor. — Joints of antennae of equal length. Hind 

 pair of legs with large flattened (dates. Brazil. 



Family. REDUVIIDiE. -Beak short, thick, and naked. Head 

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



Gi nus. Arilus. — Prothorax elevated and notched like a cog- 

 wheel. West Indies. 



Genus. II im.m \ roCERCS. —Second joint of antennae composed 

 of great number of minute joints. 



Genus. Dalaber. — Abdomen flat, wide. Third joint ofau- 

 tennoe 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. 



Family. TINGIDiE.— Small. Body broad and flat. Beak 

 three-jointed, received int.. groove en under side of head. 



Family. CAPSIDJE.— Body convex, soft; second joint of an- 

 tenna- often thickened at tip. Females with long, sabre-shaped 

 ovipositor. 



Genus. Minis.— Long, narrow. Antennae very long, second 

 joint largest, first joint thickest. No ocelli. 



Family. LYG.PEID.ffi. -Small. Antennae four-jointed. Tarsi 

 three-jointed, with two cushions between claws. 



Family. COREIDJE. -Large. Antenna- four - jointed, end 

 joint large, thick, or lung. Ocelli near each other. Beak four- 

 jointed, moderate. 



Family. SCUTELLARIDJE. -Beak four-jointed, long. Anten- 

 na- often five-jointed, last joint like others. Scutellum large. 



Genus. Edessa. — Thorax very wide, produced into a long 

 sharp point on each side. 



Gains. Scutellaria. -Scutellum very long, 1 caching almost 

 to extremity of abdomen. 



<h;l,r. APHAN1PTERA. -Wings four, veryminute, like scaly 

 plates on siiles of thorax. Antenna- minute. Mouth tor suction; 

 tarsi five-jointed. 



[I SI O I > - |. U II I' ■ I. 



Family. PULICIDJE. -As ( >rder. 

 cVi.u . I'ii.kx. — Labial palpi jointed. 



tinier. DIPTERA.— Wings two, membranous, not folded. A 

 pair of winglets at base, second pair of wings replaced by bal- 

 ancers. Mouth for sucking. Tarsi five-jointed. 



Sec) CEPHALOTA- Head distinct from thorax. 



Claws of tarsi not tooth.-, 1. 



■S'ft'rjis. KEMOCEUA. -Antenna- more than six joints; palpi 

 with four or five joints. 



Family. CULICIDJE.— Very long beak, rather thick at tip, 

 composed of seven pieces. Head small. Antenna- plumed in 

 male 



Genus. Cut. EX. — Palpi of male larger than thorax, very short 



ill female. 



Family. TIPtrLIDiE.— Proboscis very short. Palpi large 

 hau proboscis, four-jointed. 



Tll-i l.\. -Antenna- larger than 



Genus. (ii.ossi.NA. — Mouth with exserted proboscis, furnished 

 with poison-gland at base. Thorax much lunger than wide. 

 .South Africa. 



Stirps. -1 THERICEBA. — Antennae two or three joints, bristle 

 at tip. 



tl 

 thirt 



.. head, not plun 

 •n-joint.-.l. Last joint .,f palpi moderately long. Se 

 it end of 



.1, 

 ven 



, , II- at end of u ings. 



Section. BRACHOCERA. -Antennae very short. Palpi 

 with one or two joint-. 



Stirps. NOTACAXTHA. -Antennae apparently three-jointed, 



la-t joint articulated. 



Family. TABINlDffi. - Mouth w ith six lancets in female, four 

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



Genus. Iiiiam.-,- Aiit.-nua- seven-jointed, not longer than 

 head. 



lervures of wings few . 



Family. (ESTRIDJE.— No visible mouth, or only minute tu- 

 bercles. Antenna- very short. 



Genus. GEestrus.— Nervures not extending to hinder edge of 

 wings. 



Stirps. PUPIPARA.—HeaA sunk in thorax. Claws toothed. 



Family. HIPPOBOSCIDJE.— Head distinct. Legs short, stout, 

 fifth joint of tarsi largest. 



Genus. HlPPOBOSCA. — Wings ample. Nervures not extend- 

 ing to tip. 



CLASS— CRUSTACEA. 



Ringed animals, with horny «/• calcareous exterior; 

 limbs articulated — Respiration by gills or skin; 

 sexes separate. 



Sub-class. PODOPTHALMATA— Eyes on moveable footstalks. 



Order. DECAPODA, - Walking legs ten. Mouth - limbs 

 twelve, Gills ..n side of carapace. 



Suli-order. BKACHYURA.— Abdomen very small, folded 

 under the body. 



Trihe. "X YRHYXCHITA.— Carapace narrow in front, and 

 forming a beak. Mouth apparatus squared. 



Family. MACROPODIADiE.— Legs long and slender, second 

 or third pair larger than first. 



Genus. SiEX'oitiivxi'urs. — Carapace triangular, prolonged 

 into two-forked beak. Eyes not retractile. First joint of outer 

 antennae narrow, third larger than second. Abdomen six joints. 

 Many seas. 



Genus. Leptopodi v. — Claw-legs well developed, short. An- 

 tenna- feathered. West Indies and warm seas. 



Genus. Camposcia. — Carapace smooth; claw-legs small; 

 limbs witli stout bristles. Antenna- short and partly feathered. 

 Mauritius. 



Genus. Doci.ea. — Beak small; claw-limbs large ami power- 

 ful: carapace with many long and stout spines. Hotter seas. 



Family. MAIADJE. Legs moderately long, first pair often 

 larger than following; base of outer antennae large. 



Genus. Lissa. -Beak wide, notch shallow-. Claw-legs mod- 

 erate. Carapace and limbs uoduled. Warm and hot seas. 



Genus. CiiiiKiMS.-Iio.lv large and rounded; limbs rather 

 short; beak long Limbs, and sometimes body, noduled or 

 spilled. West Indies. 



Genus. Arctopsis. -Carapace triangular, front with four 

 horns, flu- two central forming a beak. Eyes on short footstalks. 

 Abdomen seven joints. Many seas. 



Genus. Hv.vs. -First joint at base of outer antennae flattened 

 and widened on outer side. Carapace wide and fiat. Many 

 seas. 



Genus. MaIa. — Moveable stem of outer antennae within coi- 

 ner of orbit. Carapace oval, beak stout. First pair of legs 

 scarcely larger than others. Abdomen with seven joints. 



Most seas. 



Genus. Mi.ii-rv.- First joint of outer antenna- bent and 

 widened at upper eud. Carapace truncated in front, and ter- 

 minate. 1 by a to,, tin .1 lull. Philippines. 



(rcnus, PetK'ERA. -Lateral antenna- inserted under muzzle. 

 Seven segments in abdomen. West Indian seas. 



Genus, Cki.h- \ nrixrs. —Beak bifid, very long, and diverging. 

 Eyes on long footstalks. Claw limbs large; carapace spinose. 



New Hebrides. 



