40 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. I28 



Medical Research Unit), August 25, 1953. Ten paratypes, ibid.; 46 

 paratypes with same data (No. B-19370) ; 18 paratypes, ibid., but at 

 Tenompak, 4,500 feet, August 20, 1953 (No. B-19319) ; 2 paratypes 

 as No. B-19319 but collected July 16, 1951; 22 paratypes as No. 

 B-19319 but collected August 31, 1953 ; 3 as No. B-19319 but collected 

 September i, 1953 ; i paratype, ibid., but ex Rattus of the rajah group, 

 Tenompak, 4,500 feet, July 19, 195 1 ; i paratype, ibid., but ex Rattus 

 rapit Bonhote, at Tenompak, 4,000 feet, August 29, 1953 (No. 

 B-19412) ; 10 paratypes, ibid., but ex Rattus sahamis, at Tenompak, 

 4,500 feet, August 29, 1953 (No. B-19414). Holotype (U.S.N.M. No. 

 2167) deposited in U. S. National Museum. Paratypes distributed 

 as for G. exilis. 



Comment. — Gahrliepia laciniata, new species, exhibits an interesting 

 and specific preference regarding site of attachment on the host. Virtu- 

 ally every specimen was found firmly attached at the bases of vibrissae 

 and adjacent short hairs or spines on the muzzle of the rat. Invari- 

 ably the chigger was solitary, and frequently was standing vertically, 

 dorsally appressed to the stout hairs and hence difficult to see. Once 

 this attachment site was discovered (in 1953), it was easy to collect 

 this chigger which had previously been considered rare. Thus, only 

 three specimens were collected by the 1951 expedition and none in 

 1952. Over 90 percent of the records are from Rattus alticola. 



GAHRLIEPIA (GAHRLIEPIA) TUBERCULATA, new species 



Figures i 16-124 



Diagnosis of larva. — Agrees with G. laciniata, new species, regard- 

 ing presence of a scrobiculate scutum and 4 submedian usurped setae. 

 Readily separable as follows : Lacking a flap extending from about 

 the cheliceral bases. PL setae shorter than 40 microns and about 

 twice the length of ALs, instead of being over no microns in length 

 and subequal to ALs. Scutum subovate, becoming narrow at distal 

 third ; relatively longer (ratio of SD to maximum width is 1.5 to 1.6), 

 whereas in G. laciniata the scutum is evenly broad until near caudal 

 margin, and the ratio SD to maximum width is 1.3. In the new 

 species the large scrobiculi are not evenly distributed over the scutum 

 but instead are most conspicuous (and largest) along the longitudinal 

 midline or core. Another group of large scrobiculi border the lateral 

 margins. There is, therefore, a narrow, relatively nonornate gap be- 

 tween the marginal group and the imaginary vertical line linking each 

 PPL. In G. laciniata the large dimples are subequal in size and 

 uniformly pit the scutum. 



