220 THE ENTOMOLOGIST. 



whole (that is, to Cimex, Fabr., 1794) ; but Olivier's definitions 

 of the two genera appear to me utterly worthless. Pentatoma 

 was disregarded altogether by Fabricius both in 1794 and 1803, 

 and was considered synonymous with Cimex by Latrielle in 1797. 



The antennae in the majority of the "Pentatomidae" have 

 certainly five segments, but a large proportion have only four, 

 and a few three. Moreover, Olivier's definition of Cimex does 

 not accord with that of Fabricius, 1775 (legitimately modified 

 from Linnaeus), and does not suffice for the remainder of 

 Fabricius's Cimex after the removal of the "Pentatomidae." 

 Furthermore, there is no indication of types nor mention of 

 species in either. I propose therefore to treat "Pentatoma, 

 Olivier," as a nomen nudum, and disregard it altogether as a 

 nomenclatural factor at 1789, but hold it in suspense till 1796, 

 when it is ranked as a synonym of Cimex by Latrielle. 



3. The types of the four genera removed by Fabricius from 

 Cimex in 1794 were fixed by the founder as follows : — 



213. Coreus, type scapha (Fabr.). 



214. Lygceus, type valgus (Linn.). 



215. Miris, type dolobratus (Linn.). 



216. Gerris, type lacustris (Linn.). 

 The first three are not generally accepted. 



Coriscus, Schrank, 1796 (type dauci), remains unidentified, 

 but the types of the other genera not previously mentioned, 

 erected between 1786 and 1803, are as indicated by Reuter, 

 except that the type of Cimex is recorded on p. 301 as ii nigrideus,' n 

 whereas it is "bidens, Linn." 



The following will demonstrate the synonymy I now propose, 

 which is really almost an entire return to the nomenclature 

 adopted by Stal in the opening volumes of the 'Enumeratio': — 



1. Cimex, Linn., 1758. Type, bidims, Linn., Fabr., 1803. 



2. Pentatoma, Oliv., 1789. Valueless [ranked as syn. of 

 Cimex, 1797.] 



3. Lygceus, Fabr., 1794= Holopterna, Stal, 1873, and modern 

 authors. Type, valgus (Linn.), Fabr. 



4. Tingis, Fabr., 1803 = Philontochila, Fieb., and modern 

 authors. Type, cardui (Linn.), Fabr. 



5. Klinophilos, Kirkaldy, 1899 = Cimex of some modern 

 author s = . 4 canthia of others. Type, lectularius (Linn.), Kirk. 



From this follows the synonymy as below : — 



1. Cimicims = Pentatomidae, auct. 



2. Ijygmibm = Coreidae, auct. 

 2a. Lygaeinae = Mictinae, auct. 



26. Coreinae = Centroscelinae, auct. 



3. Myodochid;e = Lygaeidee, auct. 

 3a. Astacopinae — Lygaeinae, auct. 



