139 
2. Trombicula minor and related species. 
A, scutum of Nymph, Trombicula sp. ( ?T. batui) found in bat-guano, Malaya ; B, scutum of Adult of 
T. minor , after Willmann ; C, scutum of Nymph, and D, scutum of Larva, species near T. minor from bat, 
Malaya. 
The original drawing (B) by Willmann is semi-diagrammatic and refers to an adult ; A & C are drawn 
somewhat similarly from nymphs for comparison. The inner line extending from the shaft of the crista 
and expanding into the areola in B shows structure lying deeply, the surface structure being monitted. 
This is in accord with the inclusion of the posterior apodeme which also lies deeply (see comments on 
structure of the scutum on p. 130). Note : In D, the PL setae can be seen placed on poorly chitinised 
extensions. In old mounts the edge of the almost-reticulated scutum is very distinct and only with 
difficulty, under phase-contrast, can this chigger be distinguished from species of Tecomatlana. 
