REVISION OF THE SARCOPSYLLIDAE 
67 
The two species can be separated as follows : — 
Eye distinct ; head and thorax of pregnant °. outside the abdomen — D. penetrans. 
Eye vestigial ; head and thorax of pregnant °. completely covered by the 
abdomen, lying in a cavity formed by the latter — D. caeca ta. 
1. Dermatophilus penetrans 
(Fig. F, and PI. IV. Fig. 28) 
As Chigue, Chego, Chigoe, Chigger, Migua, Nigua, Pico, Pique, Tschike, etc., in : 
Oviedo, Coronica de las Indias, Lib. ii. p. 14(1551). 
Staden, IVahrh. History, Cap. 53 ( 1 557)- 
Lkrv, Voy. Br'ezil p. 168 (1585). 
Hakluyt, Princip. Navigat. p. 449 (1 598-1600). 
Abbkv., Hist. Miss. Maraynan p. 256 (161 4). 
Laet, Bcschr. West Ind. p. 6 (1630). 
Bouton, Etabl. Franc. Martinique p. 91 (1640). 
Marcg. and Piso, Hist. Nat. Bras. p. 249 (1648). 
Ligon, Hist. Isle Barbados p. 109 (1657). 
Tertre, Hist. Gen. Antilles ii. p. 353 (1667). 
Rochef., Hist. Nat. Mor. Antilles p. 272 (1668). 
Gage, West Indies p. 374 (1677). 
Sloane, Voy. Nat. Hist. Jamaica I. Intr. p. 124 ; II. p. 191 (1707-25). 
Frezier, Relat. Voy. Met: Sud p. 316 (1717). 
Catesby, Nat. Hist. Carol., Florida and Bahama Is. II. App. p. 10. fig. 3 <J (1743) [Pulex 
minimus cutem penetrans). 
Barr., Nouv. Rel. France Equin. p. 63 (1743). 
Ulloa, Hist. Viaja Amer. Merid. I. p. 88 (1748). 
Brown, Nat. Hist, Jamaica II. p. 418 (1756) (Acar us Justus sub cutem nidu/ans p? obosciae acutioi e) 
Gumilla, Hist. Orenoko III. p. ; 1 1 (1768). 
Bancroft, Hist. Guyana p. 245 (1769). 
Harts., Guyana I. p. 105 (1770). 
Anter., Voy. Calif, p. 20 (1772) (Mexico). 
Bajon, Mem. Hist. Cayenne p. 149 (1778). 
Azara, Voy. Amer. Met, ed. Walker, p. 208 (1809) (not south of 29S lat.). 
Latr., Hisi. Nai. Crust. Ins. XIV. p. 411 (1805). 
Southey, Hist. Brazil I. p. 326 (18 10). 
Sack, Reise Surinam p. 239 (1821). 
Monteiro, Angola and R. Congo p. 167 (1875) (this species ?). 
Pulex penetrans, Linne, Syst. Nat. ed. X. p. 614. n. 2 (1758) ; id,, t.c ed. XII. p. 1011. a. 2 
(1767) ; Muell., Naturs. V. 2. p. 1042 (1775). 
Molina, Sagg. Storia Nat. Chili p. 214 (1782) (Chili, Coquimbo). 
Dobrizh., ed. Kheil, Hist. Obiponi. II. p. 439 (1783) (Paraguay). 
Fabr., Mant. Ins. ii. p. 314. n. 2 (1787). 
Schwartz, Kon. Vet. Ac. Hand/. IX. p. 46. t. 2 (1788) (names: Ton, Pico, Sico, Nigua, 
Chique, Chigoe, Chigger ; first scientific account). 
Gmh., Syst. Nat. I. 5. p. 2924. n. 2 (1790). 
