NO. 6 CHIGGER SUBGENUS GAHRLIEPIA — TRAUB AND MORROW 25 



at level of anterior sixth of scutum. Sensillae clavate ; with a long 

 petiole; three and a half times as long as broad. PPW-i is 70 ( ±6) ; 

 PPW-2, 40 ( ±6) ; PPP-i, 54 ( ±7) ; PPP-2, 15 ( ±4). Body setae: 



STANDARD MEASUREMENTS IN MICRONS 



-^Ci^i^^a^^^Ci^Ci Coxa II SD ASB Tarsus III 

 Holotype, U.S.A.T.C. 



No. I03S-6 36 52 41 21 92 10 35 50 36 52/58=0.9 0.46 2.5 52/53=0.98 



Paratypes (i6): 



Mean 37 54 42 21 97 10 34 49 36 0.96 0.45 2.5 0.94 



Range + or— 4 6 5 3 5 2 4 4 3 0.07 0.06 0.5 0.06 



Dorsal setae (fig. 62) usually thicker than usurped scutal setae; with 

 but 3 to 5 fairly stout barbs, these subpectinate in appearance ; about 

 32 to 36 in number (excluding usurped setae), arranged 4.4(2). 6 

 (2). 8, the rest irregular. Ventral setae about 50 in number, of which 

 about 22 to 26 are postanals rather resembling dorsal setae. True 

 ventrals thin, short, about 15 to 18 microns, with fine pinnae. Legs: 

 Coxae I -setose. Coxa III relatively broad, ratio of length to breadth 

 about 1. 17; with seta almost anteromarginal. First pair of sternal 

 setae long, extending almost to bases of posterior sternals. With 4 

 sternal setae between coxae III, the extra pair probably due to for- 

 ward displacement of two true ventral setae. Sensory setae as in 

 G. exilis, new species. 



Type material. — Holotype (U.S.A.T.C. No. 1035-6) ex Rattus rat- 

 tus sladeni (Anderson), North Burma, 20 miles northwest of Myit- 

 kyina on Mogaung Road (in the forest edge). May 22, 1945 (U. S. A. 

 Typhus Commission). Thirty-three paratypes as follows (all col- 

 lected U.S.A.T.C. unless otherwise specified) : 17 with same data 

 as holotype; 8, ibid., but ex Rattus fulvescens fulvesccns (Gray), 

 April 23, 1945; 3, ibid., but ex Rattus sp., January 24; 3 ex Tupaia 

 at Shadazup, September 2, 1944 (H. S. Fuller) ; i ex Rattus r. 

 sladeni, at Shingbwiyang, May 8; i ex Crocidura vorax Allen at 

 Shingbwiyang, January 10. Holotype (U.S.N.M. No. 2161) and 

 three paratypes deposited in U. S. National Museum. Paratypes dis- 

 tributed as for G. exilis, new species. 



Comment. — G. gemina was collected on 16 occasions in North 

 Burma. In all instances it was taken in primary jungle or heavy forest 

 but only during the dry season. When collected, this chigger consti- 

 tuted between 2 and 4 percent of all the trombiculids examined from 

 the particular host, but the percentage was usually less than 10 

 percent. 



The specific name was suggested by the approximation of the PL 

 and AL setae. What we have here called the posterolateral setae 



