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FIELDIANA: ZOOLOGY, VOLUME 42 



The female of this species is distinct in that the metapodal plates 

 are small, elongate bean-shaped; the distance between the epigynial 

 setae IV is greater than the distance between setae I; the adanal setae 

 are located laterad to the posterior margin of the anal opening and 

 barely reach the base of the postanal seta; the peritreme extends to 



y/^'\\\< 



Fig. 26. Laelaps nuttalli, female: A, anterior portion of dorsal plate; B, pos- 

 terior portion of dorsal plate; C, venter. 



the middle of coxa I; the distal setae on coxa I are spinelike, and 

 coxae II and III have spinelike setae (though one specimen in the 

 series differs in having the setae on coxae I and II not spinelike). 



Specimens examined. Mindanao: Tagum, Davao, October 12, 

 1946 (H. Hoogstraal), 2 females, ex Rattus mindanensis. Palawan: 

 Calamianes Group, Siuk, Culion Island, April 7, 1947 (M. Celestino), 

 10 females, ex Sciurus culionensis Sanborn. Visayas: Basey, Samar, 

 September, 1945, June 29, 1945 (F. F. Bibby), 4 females, ex Rattles 

 norvegicus. Mindoro: April 27, 1945 (W. K. Clark), 2 females, ex 

 Rattus rattus; April 30, 1945 (W. Howe), female, ex Rattus vigoratus. 



Laelaps spinigera, new species. Figure 27, A-C. 



This species is readily distinguished from other Laelaps species in 

 possessing strong, recurved spines on femur, tibia and tarsus of leg I, 

 and a thumblike distal seta on coxa I. The posterior margin of the 



