592 PROCEEDINGS OF THE NATIONAL MUSEUM vol. uo 



and one tergal plate per segment, these plates well developed. Typical 

 sternal plate with 7 to 9 setae along posterior margin; tergal plates 

 with 15 such setae; ventrally 1 lateral seta off the plate on each 

 segment; dorsally with 2 or 3 lateral setae. Paratergal plates with 

 apical setae shorter than the plates; posterior margin with postero- 

 lateral angles acutely pointed and with each setal base usually flanked 

 by shorter points. Tergal plate of segment 8 joined with paratergal 

 plates VIII. Genitalia with penis opening at about proximal third 

 of parameres; parameres broadly convex laterally, their apices folded 

 over pseudopenis dorsally; pseudopenis serrate distally, extending 

 well beyond apices of parameres. Terminal lobes of abdomen not 

 enlarged or elongate. 



Female: Head as in male except third antennal segment normal. 

 Thorax and legs as in male. Abdomen with two well-developed 

 sternal and tergal plates on each typical segment; plates with row 

 of 7 to 10 setae. Ventrally each segment with one lateral seta off 

 plates on each side; dorsally with one to two such setae off each plate 

 on each side. Paratergal plates as in male except plate VIII not 

 joined to tergal plate of segment 8. Genitalia: Lateral setigerous 

 lobes of segment 8 ("gonopods") lying almost horizontally, widely 

 separated, margin of vulva between them only somewhat convex; 

 genital plate not heavily spiculated. 



Lengths: Male 1.67 mm.; female 2.25 mm. 



Neohaematopinus elbeli, new species 



Figures 64-68 



Type data: Holotype male, allotype female from Dremomys 

 rufigenis, loei: Dan Sai, Kok Sathan, Phak Khi Nak Mt., March 

 19, 1955, RE-4977, R. E. Elbel collector. One male, one female 

 paratypes with same data as holotype. One male paratype, Dan 

 Sai, Na Haeo, Ban Bo, May 15, 1955, RE-5236. Three male para- 

 types. Ban Bo, May 19, 1955, RE-5279. All specimens were taken 

 from Dremomys rufigenis. 



Holotype deposited in the collections of the U.S. National Museum, 

 type catalog No. 64387. 



This species is named for the collector, Robert E. Elbel, whose 

 magnificent collections of Thai ectoparasites have made known a 

 fauna completely neglected in the past. 



Diagnosis : N. elbeli is a member of the group of Neohaematopinus 

 species that have the posterior angles of the thoracic sternal plate 

 produced into points, and paratergal plates IV- VI with no more than 

 two apical setae. It is closest to A^. inornatus (Kellogg and Ferris), 

 which also has the abdominal plates much reduced, but is distinct in 

 that the head is almost as broad as long in elbeli ; the thoracic sternal 



