AMBLYOMMA. 19 
AMBLYOMMA. 
Amblyomma, C. Li. Koch, System. Uebers. iiber die Ordn. der Zecken, in Arch. f. Naturg. x. Jahrg. 
Bd. 1, p. 223 (1844). 
1. Amblyomma mixtum, (Tab. XII. figg. 1-17, 9; 2-24,¢.) 
Amblyomma mixtum, C. L. Koch, loc. cit. p. 227; Uebers. d. Arachnidensyst. Heft iv. pp. 74, 75, 
t. 13. figg. 47 (¢), 48 (¢). 
¢. Corpus ovatum, valde depressum, subtus concavum, colore ex rufo brunneo. Superficies dorsualis punctis 
numerosis impressis atque lineolis arcuatis irregularibus, interruptis, undulatis, flavo-albescentibus ornata, 
quee ex dorsi centro, radiorum instar, ad peripheriam corporis petunt. Earum due maxime angulum 
humeralem cujusque lateris capessunt inter quas area triangularis fere unicolor et lineolis albidis fere 
carens interest. Fovev frontales nulle. In abdominis parte posteriore lineole obscure fusce ex intestinis 
translucentibus nate, albidis se admiscent. Inter sulculos marginis posterioris lineole albide et fusce, 
breves, radiatim per pares alternantes disposite, adsunt. Scutum frontale, rostrum et palpi rufo-brunnei. 
Orificium genitale rimam angustam transversalem formans. Lamina analis in utroque latere marginis 
posterioris setis duabus longis armata. Pedes rufo-brunnel, setulis paucis sericeis armati. 
Long. 4°5 millim.; lat. 3-5 millim. 
@. Corpus ovatum, in jejunis valde depressum, in satiatis depresso-globosum. Scutum occipitale magnum, 
triangulare angulis rotundatis, centrum dorsi angulo postico fere attingens, leve, colore rufo-brunneo, 
marginibus lateralibus fuscis, maculis albido-flavis irregularibus, disjunctis, e margine postico in ramos 
duo ramificatos discedentibus. Foveole punctiformes scuto impresse numerose, nigre. Abdomen colore 
fusco-olivaceo, margine clarius brunneo, haud nitidum, setulis albidis raris ornatum, punctis, sulcis et 
foveis impressis iniquum. In jejunis intestina colore fusco translucent, in satiatis abdomen colorem 
uniformem obscure purpureum seu rubidum exhibet. Lamina stigmatica triangularis, angulis late rotun- 
datis, lateribus arcuatis. -Rima stigmatica claviformis. Area genitalis triangularis ; orificium genitale 
transversale angustum, margine anteriore subtilissime denticulato. Area analis rectangulata angulis 
rotundis, valvulis analibus semilunatis ; queeque valvula in apice anteriore setis duabus, in posteriore setis 
tribus armata. Scutum frontale foveis duabus rotundis ornatum. Palpi, rostrum et pedes in ambobus 
sexibus equaliter constructi. Palpi rostrum haud superantes, compressi, articulo quarto brevi, in apice 
tertii inserto, colore corporis, ad apicem secundi et ad basin tertii articuli macula fusca interne ornati. 
Apex rostri albido-flavus. Basis rostri et anguli posteriores scuti frontalis fusci. Arca maxillaris colore 
succineo, dentibus conoideis, sat erectis, inter se sat distantibus armata. Arca mandibularis in utroque 
latere hamulis quinque armata: eorum primus longissimus, secundum velut appendiculam brevem 
insertam ferens ; tertius, quartus et quintus in ramo segregato dispositi. Pedes rufo-brunneis, setulis 
paucis armati. Pedes antici longiores, externe denticulati, ceterorum parium articulus quintus in apice 
dentibus duabus armatus. Variant foemine hujus species in singulis individuis colore plus minusve 
clariore scutorum occipitalis et frontalis, nec non rostri et pedum. Accedit ad hoc quod macule albide 
scuti occipitalis ramificate extensione multum variant. 
Long. 4°5 millim., lat. 3°5 millim. in jejunis, ad long. 12 millim. et lat. 8 millim. in satiatis. 
Hab. Mexico (Koch); Guatemata, Retalhuleu, Antigua (Stoll); Nicaraeva, Chontales 
(Janson); Costa Rica, Cache (Rogers). 
3. Body oval, much depressed, concave on its lower surface, testaceous, the dorsal 
surface with numerous punctiform black and testaceous dimples and several irregularly 
shaped, arcuate, narrow whitish stripes, which radiate from the centre of the dorsum 
and are sometimes interrupted so as to form a mere series of spots; a triangular area 
behind the anterior margin of the collar is comparatively free from these spots. On 
each side-margin and parallel to it there runs a narrow longitudinal stripe, which 
p*2 
