NO. 6 CHIGGER SUBGENUS GAHRLIEPIA — TRAUB AND MORROW 5 1 



penetrans, and G. (G.) ampullata, new species, in that PW is over 90 

 instead of below 80 as in other species. Nearest to G. tuberculata but 

 significantly diflfers as follows: Although AlV is approximately the 

 same in both species, ASB 25 or greater in granulata, not approxi- 

 mately 18; AL over 40, not 18; PL over 60, not merely less than 40 ; 

 PSB approximately 300, not 215. The long ovate scutum immedi- 

 ately distinguishes this species from G. penetrans and G. ampullata 

 (cf. figs. 129, 136, and 145). 



Description of larva. — Body: Subovate, about 473 x 252 microns 

 in engorged holotype. Eyes double; anterior eye the larger. Chelic- 

 erae about three and a half times as long as broad at base ; with a dis- 

 tinct distal tricuspid cap. Palpal setal formula : B/B/NNf. Palpal 

 claw 3-pronged but usually appearing 2-pronged. Scutum: Long, 

 ovate, about 329 x 182 microns in holotype. Anterior margin concave 

 between ALs. Lateral margins slightly sinuate to level of PLs; re- 

 mainder evenly but shallowly convex. Posterior margin short ; convex. 

 Interspersed among micropunctae is a fairly uniformly distributed 

 series of subequal ovate scrobiculi most of which are about the size 

 of sensillary bases ; marginal craters or pits slightly larger than medial 

 ones. Virtually entire scutal surface thus appearing granulated (al- 

 though in reality pitted) or shagreened. The scrobiculi fewest in num- 

 ber in the region between the usurped setae and the group along 

 lateral margins of the scutum. AL setae somewhat removed from 

 anterolateral angles to a point just mesad to sensillary bases ; stout and 

 plumose but barbs short. PL setae similar but about one and a third 

 times as long; inserted slightly farther from SB than are ALs; well 

 lateral to level of ALs. Usurped setae roughly in line with ALs; 

 first pair inserted approximately at anterior third of scutum ; second 

 pair slightly caudad of posterior third; each about 47 microns long, 

 with pinnae appressed. With ridges anterior to sensillae bases. Sen- 

 sillae clavate, about 49 x 9 microns. Sensillary area free of punctae 

 and scrobiculi. PPlV-i is 68 ( ±8) ; PPW-2, 70 ( ±5) ; PPP-i, 210 



( ± 10) ; PPP-2, 102 ( ± 12). Body setae: Dorsal setae of two types 

 — a line of 4 or 5 single large, stout setae bordering each side of mid- 

 dle third of scutum, about 80 microns in length ; the remainder more 



