38 CATALOGUE OF 



§§ Head beneath red or yellowish, or at least with 



the bucculi wholly pale. 

 X Prothorax in front depressed, or slightly concave; 



sides slightly rounded in the middle. - Microspilus 



XX Prothorax not depressed in front; sides almost 



wholly straight, or a little rounded near the 



hind border. 

 o Scutellum rather convex hindward ; a slight longi- 

 tudinal keel only close to the tip. - - Melanoryiheus 

 oo Scutellum with a distinct obtuse keel, extending 



from the tip to the middle or beyond the 



latter. - Lyg-eus. 



De Mayr has divided Lygoeus into the following sections: — 



1. Rostrum extending to the hind border of the third ventral segment, 



Prothorax not emarginate behind. Scutellum even. Femora un- 

 armed. 1. leucurus, Fair. 



2. Rostrum extending to the second ventral segment. Prothorax impressed 



near the fore border, without any transverse middle impression ; sides 

 prominent; hind border more or less emarginate. Scutellum with 

 elevated sides. Femora unarmed. I. fasciatus, Dull. 2. aulicus, 

 Fabr. 3. varicolor, Fair. 4. unifasciatus, llahn. 5. castaneipes, 

 Dull. 6. Amboinensis, Mayr. 



3. Rostrnm extending to the hind border of the pectus. Prothorax as in 



Sect. 2, hardly emarginate behind. Scutellum nearly even, with a 

 middle keel. Femora unarmed. 1. familiaris, Fabr. 



4. Rostrum extending to the fore border of the second ventral segment. 



Prothorax somewhat even; hind border straight. Scutellum even, 

 with a middle keel. Femora unarmed. I. apicalis, Dull. 2. elatus, 

 Stal. 3. pulchellus, Fabr. 4. pallidociuctus, Stal. o. xanthostaurus, 

 H.-Sch. (i. Poeyi, Guer. 



5. Rostrum extending to the middle coxa; or to the hind coxae. Prothorax 



almost even ; sides not or but little prominent. Scutellum even, 

 keeled, with two transverse impressions. Femora unarmed. 1. apuans, 

 Rossi. 2. equeslris, Linn. 3. tineicus, Fabr. 4. albostillatus, Stal. 

 5. maculicollis, Germ. (>. servus, Fabr. 

 (!. Rostrum extending to the base of the abdomen. Prothorax with a 

 transverse ridge in front, with a longitudinal keel hindward; sides 

 and hind border straight. Scutellum deeply keeled. Femora 

 unarmed. 1. ful v ipes, Dall. 



7. Rostrum extending to the middle of the hind pectus. Prothorax with a 



transverse impression in the middle or a little before the middle, and 

 with a slight transverse ridge in front; sides prominent. Scutellum 

 even, keeled, with two impressions. Femora of the male denticulated. 

 excepting those of L. pacificus. 1. mili laris, Fabr. 2. crudelis, Fabr. 

 3. saxalilis, Scop. 4. hospes, Fabr. 5. pacilicus, lioisd. 6. mundus, 

 Dull. 7. Fairmairei, Synt. 



8. Rostrum extending to the middle of the hind pectus. Head distinctly 



tumid near the antennifcrous tubercles. Prothorax almost even, with 

 a slight keel more slanting in front. Scutellum even, keeled. Femora 

 unideuticulatc, or with a lew minute teeth. 1. longulus, Dall. 



