some Arachnida from Yemen. 219 



head 3 ; length of palp 12, its two distal segments 4-8, 

 fourth leg 1*7. 



Log. Dthala. One female specimen. 



In the coloration of the palpi this species resembles 

 D. Simoni, from Obok (see Kraepelin, Das Tierr., Solif agae, 

 p. 99, fig. 70), but is entirely different in the dentition of the 

 mandibles. The coloration of tiie palpi serves to distinguish 

 it from D. tunetana^ subsp. yemenensis^ Simon, collected at 

 Aden, which it apparently resembles in dentition. 



Order ARANE^. 



Specimens of only three species of Arachnomorphas were 

 in the collection, namely, an example of Oci/ale atalanta, 

 Aud., from Dthala, two examples of Sparassus Walckenaerii, 

 Aud., from El Kubar, and one of a species of Tkomisus I do 

 not recognize, from the Azraki Hills. 



Family Aviculariidae. 



Genus MOXOCEXTKOPUS, Poc. 



Monocentropus longimanus, sp. n. 



cJ . — Colour a uniform sooty mouse-brown. 



Carapace shorter than tibia of palp, about as long as that 

 of the first or fourth leg, slightly longer than the protarsus of 

 the first, very distinctly shorter than that of the fourth ; 

 anterior median eyes distinctly larger than anterior laterals, 

 which are themselves larger than the posterior laterals; the 

 latter subequal to the posterior medians. 



Legs 4, 1, 2, -3 ; fourth exceeding first by half the length of 

 its tarsus ; femur of third thicker than tliat of the other legs; 

 protarsi with from one to three inferior apical spines ; tibia of 

 first and second with a pair of inferior apical spinules, of 

 third and fourth unarmed ; scopula^ on protarsi of first and 

 second not reaching the base of the segment ; tarsal scopula 

 of fourth basally divided ; first leg unmodifiedj tibial spur 

 low, with pectination of spines. 



Palp unspined, very long, overlapping by its tarsus the 

 tibia of the first leg ; femur as long as that of the second leg ; 

 tibia cylindrical, more than twice as long as patella, a little 

 longer than that of the first or fourth leg, but shorter than 

 the protarsus of the latter ; tarsus of normal form and length ; 

 palpal organ short, about as long as the tarsus ; bulb piri- 

 form, gradually narrowing where it passes into the style, which 

 shows a slight sigmoid flexure when viewed from the front. 



