(1. top): Scorpio filum Hempr. et Ehr. = Isometrus maculatus (De Geer, 1778) (1a: head from above, 1b: pectine)
(2. left): Scorpio granosus P. Gerv. = Megacormus granosus (Gervais, 1843) (2a: head from above, 2b: pectine, 2c: end of tail)
(3. right): Scorpio maurus de Geer = Scorpio maurus Linnaeus, 1758 (3a: head from above, 3b: pectine, 3c: end of tail)
(4. bottom): Scorpio biaculeatus Lucas = Centruroides gracilis (Latreille, 1804) (4a: pectine, 4c: end of tail)
Source

Français : Expédition dans les parties centrales de l'Amérique du Sud, de Rio de Janeiro à Lima et de Lima au Para sous la direction du Comte Francis de Castelnau , 1856 (exemplaire de la bibliothèque patrimoniale de Gray (France))
Author François-Louis Laporte, comte de Castelnau (1802–1880)
Source: https://commons.wikimedia.org/wiki/File:F_de_Castelnau-scorpionsPl02.jpg


(1. top): Scorpio filum = Isometrus maculatus (lesser brown scorpion)
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The lesser brown scorpion (Isometrus maculatus) is a species of scorpion in the family Buthidae. Its distribution is pantropical; it is an introduced species in Hawaii.
Order: Scorpiones > Family: Buthidae > Genus: Isometrus > Species: Isometrus maculatus

(2. left): Scorpio granosus = Megacormus granosus
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Megacormus granosus is a species of scorpion in the family Euscorpiidae. This species is endemic to Veracruz in Mexico. It is found in around San Andrés Tenejapan, Calcahualco, Huatusco and Córdoba.
Order: Scorpiones > Family: Euscorpiidae > Genus: Megacormus > Species: Megacormus granosus

(3. right): Scorpio maurus (largeclawed scorpion)
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The large-clawed scorpion (Scorpio maurus), also known as the Israeli gold scorpion or Zerachia scorpion, is a species of North African and Middle Eastern scorpion of the family Scorpionidae. It has brown back and golden claws. These scorpions are found in very deep burrows in deserts and occasionally sparse woodland.
Order: Scorpiones > Family: Scorpionidae > Genus: Scorpio > Species: Scorpio maurus

(4. bottom): Scorpio biaculeatus = Centruroides gracilis (Florida bark scorpion)
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The Florida bark scorpion (Centruroides gracilis), also known as brown bark scorpion or slender brown scorpion, is a species of scorpion in the family Buthidae, the bark scorpions.Contrary to one of its common names, it is not actually native to Florida in the United States. It is native to northern parts of the middle Americas, including Mexico, Guatemala, Belize, and Honduras.
Order: Scorpiones > Family: Buthidae > Genus: Centruroides > Species: Centruroides gracilis