ORNITHODOROS CORIACEUS KOCH. 19 



palpi are short, the last joint cylindrical and deflected backward. 

 The legs (PI. I, figs. 5, 6) are long and slender, the fourth pair nearh- 

 as long as width of body ; tibise, metatarsi, and tarsi I, II, III have 

 several prominent tubercles above, and tarsi IV have a basal hump 

 and a prominent subterminal spur above. All legs wdth a few hairs ; 

 the tibia and metatarsus are more than twice as long as broad. 



Length of swollen female, 7 to 8 mm. 



Described by Koch from Mexico. I have seen specimens from San 

 Francisco and from Santa Clara County, California. It has been 

 taken from cattle and from cattlemen. The spur on the hind tarsus 

 is very characteristic and, with the ej^es, will readily separate it from 

 our other species. 



Ornithodoros talaje Guerin. 



Color light to dark brow^n, legs paler. Body cone-like in front, 

 broadly rounded behind, a broad depressed groove each side, united 

 in front. About four depressed smooth patches each side on dorsum, 

 the hind pair more elongate. Venter with a groove each side run- 

 ning obliquely dowai on sides, a median groove from anus behind: 

 a depressed area in front of anus, and toward tip a prominent trans- 

 verse groove with recurved tips. Body thickly covered with large 

 roughened and sculptured granules, smaller on the middle of the 

 venter. No eyes. Rostrum usually sunk in a cavity, the thin edges 

 of which may partially overlap it ; these edges are roughened like 

 the surrounding surface. The palpi (PI. I, fig. 7) are short, and 

 have the last joint slender and deflected backward. The entire 

 rostrum is retractible, so that, one may see only the tips of the palpi. 

 The legs (PL I, figs. 8, 17) are short, but slender, and provided with 

 many fine hairs; there are no humps nor tubercles on any of the tarsi, 

 tibia?, or metatarsi. All tarsi are very slender; the tibia? and meta- 

 tarsi more than twice as long as broad. 



Length of swollen female, 5 to G mm. 



This species was described by Guerin Meneville from Guatemala, 

 and I have examined specimens from Gum Cave, Citrus County, 

 Fla. ; Brownsville, Tex%, and San Clemente Island, California. 



The figures by Nicolet in Guerin's article are quite detailed, and 

 leave no doubt as to the identification of the species. It is readily 

 known by the simple tarsi and by the sculptured tubercles of the 

 body. It was not described until 1849 in spite of the fact that in 

 the Magasin de Zoologie, Annee 1845, it appears in the same form 

 as in the Eevue et Magasin de Zoologie, Annee 1840. That volume of 

 the Magasin de Zoologie w-as begun in 1845, but not finished until 

 1849; moreover, as shown by the article itself, the tick was not 

 collected until May, 1847. 



