XXVI 
fixed the type of Notonecta as glauca, and of Nepa as cinerea. In 1762 
Geoffroy 1) anonymously founded Nawcoris (type cimicoides not Linneus, — macu- 
latus), and Coriva (type striata not Linneus, = geoffroyi). In 1775 Bare ce 2) 
erected Acanthia and Reduvius, without types, and Sigara with a single species 
which being the same as Geoffroy’s species, relegated Sigara as a synonym 
of Corixa. In 1786 Scopoli *) announced Ploiaria (type domestica), and the next 
year, Swederus *) described Macrocephalus (type cimicoides), and Fabricius *) in 
1790 founded Ranatra, but without a type. The previous year Olivier 6) had 
founded Pentatoma without species. In 1794 Fabricius”) further erected four 
new genera, fixing a type for each; viz: Coreus (scapha), Lygaecus (valgus), 
Miris (dolabratus) and Gerris (lacustris). In 1796 Schrank *) proposed Coriscus, 
without a validly named species, and the same year Latreille%) founded 
Hydrometra, without types, and restricted Acanthia to the riparian forms now 
known under that name. In the last year of the century, Schellenberg !°) 
founded Aquarius, but without types. In 1801 Lamarck 1") founded Seutellera 
(type nobilis not Linneus, = perplera) and fixed the following types, viz: 
rujipes for Pentatoma 1789; and personatus for Reduvius. He mentioned two 
species for Hydrometra, but as only stagnorum applies to the original generic 
description, it must be taken as the type. In the same year Schrank !) 
described two species under Coriscus, but dauci (= calcaratus) is the type, as 
being the species described, but not named, in 1796. He also founded 
Thyreocoris without a type. In 1802 Latreille 1%) erected Phymata (crassipes) 
and || Galgulus (oculatus), also, without types, Neides and Nabis. The next year 
Fabricius again 1*) contributed Salda (zosterae) [synonymous with Acanthia 1775], 
Aradus (betulae), Syrtis (erosa) [synonymous with Phymata of the previous year], 
Tingis (cardui), Canopus (obtectus), Tetyra (arcuata), Edessa (ceruus), Halys (den- 
tata), Cydnus (tristis), Aelia (acuminata), Capsus (ater), Alydus (calcaratus) [syno- 
nymous with Coriscus 1796], Emesa (precatorius), Berytus (tipularius) and Zelus 
(longipes). He also fixed bidens for Cimex 1758, his other type-fixations, viz: 
Acanthia, Lygaeus, Hydrometra, Gerris and Reduvius, not being valid. 
In 1804 Latreille !5) founded Velia, but without a type; at the same 
than one in each genus, then must Fabricius in 1794 be rejected, because he only 
indicated types in some instances, and the same would apply to many, or most, 
modern hemipterists. I reject Roemer in 1789 because he was merely discussing 
two systems and cites the same species in different genera, for instance, lectularius 
in both Cimex and Acanthia. 
1) Histoire abregée des Insectes I. 473—82. For some unknown reason, he 
changed Nepa to Hepa. 
2) Systema Entomologiae 673—732. 
8) Deliciae Faun. Insubricae I. 60—61. 
4) Vetensk. Ac. nya Handl. VIII. 183—85. 
>) Encyclopédie Méthodique 1V. 24—25. 
8) Skrift. Nat. Selsk. Kjébenh. I. 213—28. 
7) Entomologia Systematica IV. 1—208. 
8) Samml. Naturh.-phys. Aufs. I. 121. 
°) Précis des caractéres gén. insectes II] and XII, and 83—92 and 202. 
10) Geschl. Land- und Wasserwanzen 1—25 (1800). 
11) Systeme anim. sans vertebres 289. 
12) Fauna Boica Il. 44. 
13) Hist. Nat. Crust. Ins. III. 240—63. 
14) Systema Rhyngot. 1—292. 
18) Nouv. Dict. Hist. Nat. XXIV. 163—68. 
