790 



COMPENDIUM OF GENERIC DISTINCTIONS. 



CLASS, INSECTA. 



N.B. If no country is mentioned, the insect is British. 



Ringed animals^ breathing by tracheae Head distinct Legs six, antennae two ; subject to metamorphosis in cari$ 



stages, mostly developing wings. 



Order. COLEOPTERA. Front wings horny or leathery, 

 concealing the second pair of wings when at rest, horizontal, 

 united down back by straight suture. Hinder of wings 

 membranous, folding cross-wise and longitudinally. Mouth 

 with transversely moveable jaws. Pupa incomplete. 



Section. PENTAMERA. Tarsi with five joints, 

 fourth of ordinary size. 



Sub-section. ADEPHAGA. Outer lobe of maxillae dis- 

 tinct and jointed ; inner edge of lower jaws with strong 

 spines, tip hooked. 



^ GEODEPHAGA.Lega long, formed for run- 



ning ; jaws long, horny, and curved ; eyes prominent. 



Family. CICINDELID.ffi. Terminal hook of maxilla) 

 articulated at base ; head wider than thorax ; mandible 

 long, sharp, and toothed. 



Genus. CICINDELA. Front tarsi of male with three first 

 joints dilated. Wings large. Many lands. 



Genus. MANTICORA. Elytra soldered together. Tarsi 

 not different in sexes. Mandibles projecting and long ; head 

 large. Africa. 



Genus. TRICONDTLA. Wings none. Body long and 

 narrow. Thorax globular. Hot climates. 



Family. CARABID5!. Maxillse not clawed. Labial 

 palpi three-jointed, set on footstalk. Head not wider than 

 thorax. World-wide. 



Genut. CARABUS. Labruni wavy in middle. Thorax 

 squared, edges rounded or slightly heart-shaped. Abdomen 

 oval. Wings not fit for flight. 



Genus. BRACHINUS. Labrum broad and short. Mandibles 

 projecting, with two basal teeth. Joints of tarsi entire. 

 Thorax short ; elytra broader than thorax and truncated. 



Genus. ANTHIA. Labrum rounded, covering base of 

 large mandibles. Thorax narrow behind. Eyes prominent. 

 Wings absent. 



Genus. LEBIA. Claws of tarsi toothed beneath. Men- 

 turn with two lobes ; no tooth. Last joint of labial palpi 

 hatchet-shaped. 



Genut. MORMOLTCE. Antennae very long. Head very 

 long, narrow, especially behind. Elytra short, with lobes 

 wider than abdomen. Java. 



Genus. HARPALUS. Tarsi of four front feet with three 

 or four first joints wide, and heart-shaped. 



Stirps. HYDRADEPHAGA. Legs for swimming, 

 two latter pairs flat and fringed with hairs. Body oval and 

 mostly flat. Mandibles short and strong. Thorax broader 

 than long. 



Family. DYTICID.35. Front legs short ; antenna long. 



Genus. DTTICUS. Tarsi of males wide and flat. Eyes 

 at edge of head, which is drawn into the thorax as far as 

 eyes. Last joint of maxillary palpus oval, and larger than 

 others. 



Genus. ILYBIUS. Elytra smooth. Body very convex, 

 narrow between ; second and third joints of labial palpi 

 nearly equal. 



Family. GYRINID.SS. Front legs long ; antennae short. 



Genus. GYRINUS. Antennae shorter than head, nine- 

 jointed. Eyes divided by lateral edge of head. Elytra not 

 covering tip of abdomen. 



Sub-section. RYPOPHAGA. Palpi four ; antennas more 

 or less complex ; basal joints of male tarsi dilated. 



Stirps. BRA CHELYTRA. Elytra very short; legs 

 for swimming ; antennae increasing gradually to tip. 



Family. STAPHYLINID.E. Head very distinct ; neck 

 narrow. Antennae set between or in front of eyes. Man- 

 dibles long, having on the inside a fringed membranon 

 apparatus. 



Genus. STAPHYLINUS (including OCYPUS and CRB 

 PHILU8). Antennas distant at base. 



Stirps. NECROPHAGA. Elytra mostly covering at 

 domen. Antennas often knobbed at tip. 



Family. SILPHID.E. Body flat ; head bent rather 

 downward. Maxillae two-lobed. Antennae thickened at 

 tips. Legs not contractile. 



Genus. SILPHA. Antennae longer than head, club pear- 

 shaped ; a hook inside maxillae. Head small ; thorax 

 broad. 



Genus. NECROPHORUS. Antennae short, club globular. 

 No hook or maxillae. 



Section. CHILOGNATHOMORPHA. Larva 



with long and cylindrical body ; end of abdomen curved 

 un-ler breast. 



Slirps. CLA VICOJRJVES.A.niermsa club-shaped. 



Family. HISTERID5!. Body squared, shining. An- 

 tennae short, elbowed ; club three-jointed. Elytra short ; 

 legs toothed. 



Genus. HISTER. Head small. Elytra shorter than ab- 

 domen, blunt. Head retractile. 



Stirpt. LAM ELLICORN ES. Club of antennae formed 

 of teeth or plates. 



Family. LTTC AN IDS.. Club-toothed . 



Genus. LUCANUS. Mandibles of male very large, like 

 stag's horns ; those of female, short, sharp, stout, and 

 curved. Club of antennas four-jointed. 



Family. MELOLONTHID.ZE. Labrum two-lobed ; man- 

 dibles strong. Maxillae with several teeth at tip. Club of 

 antennae formed of flattened plates. Elytra not quite reach- 

 ing extremity of abdomen. 



Genus. MELOLONTHA. Club with six or seven joints ; 

 claws equal, with basal tooth. 



Family. GEOTRUPIDJE. Maxillary lobes membranous ; 

 mandibles projecting. Elytra rounded behind, and covering 

 abdomen. Club large, globular. Thorax broader than long. 



Genus. GEOTRUPES. Antennae eleven-jointed, third 

 joint larger than second ; neither thorax nor head armed. 

 Body rounded. 



Family. SCARABEIDJE. Clypeus large, concealing- 

 mandibles, which have a fringed membranous plate at their 

 tips. Antennae eight or nine-jointed. Body rather flat- 

 tened. 



Genus. SCARABEUS. Head similar in sexes, not horned. 

 Thorax of male often horned or tubercled. Hot countries. 



Genus. CHALCOSOMA. Head, one horn reflected, toothe-j 

 behind. Maxillary palpi four-jointed ; labial three-jointed 

 Thorax three-horned, central very short. Hot countries. 



