MALAYSIAN PARASITES VII 
NEW GENERA AND SPECIES, APPARENTLY OF APOLONIINAE 
(ACARINA, LEEUWENHOEKIIDAE), FROM THE ASIATIC-PACIFIC REGION 
By 
H. WOMERSLEY 
The subfamily Apoloniinae was established in 1947 by Wharton to include the genera 
Apolonia Torres and Braga and Womersleyia Wharton. His diagnosis of the subfamily was 
as follows: “ Trombiculids with seven segments on all legs, one seta on coxae I, an anterior- 
median projection of the scutum, stigma and tracheae present, numerous ventral setae between 
the posterior coxae, and the posterior lateral scutal setae not on the scutum.” 
Wharton, aided by Fuller (1952, p. 90) later included Sauracarella Lawrence 1949, and 
gave the following diagnosis: “ Trombiculids whose larvae have all legs composed of seven 
segments, and have paired, submedian, anterior, scutal setae, or an anterior, median, scutal 
projection or both. Sensillae expanded or attenuated. ” 
In the present paper, the writer includes six additional genera, Cockingsia nov., Audyana 
nov., Mackerasiella nov., Grossia nov., Nothotrombicula Dumbleton and Womersleyia Radford. 
This is a heterogeneous assemblage of genera, but on larval characters they would be included 
in an expanded subfamily Apoloniinae, a concept which the writer believes to be useful at the 
present stage of knowledge. A clear line cannot at present be drawn between the Leeuwen- 
hoekiidae, a family largely founded on larval characters, and the Trombidiidae, largely founded 
on adult characters. Until such time as the species discussed below are reared to the nymphs 
and adults, and comparisons made with related members of the Trombidiidae, placing them 
in the Apoloniinae sensu lato must be regarded as no more than tentative. This opportunity is 
nevertheless taken to describe these genera and species so that they will be available for 
consideration while our understanding of the Leeuwenhoekiidae is developing. The genus 
Audyana nov., for example, was at first considered as most nearly related in the larval stage to 
the Apoloniinae, but nymphs which have subsequently been bred show that this is a Trombelline 
genus near Trombella , in the family Trombidiidae. The relationships between such genera 
and those of the Apoloniinae require a great deal of study. 
Key to Genera of Larvae from the Asiatic-Pacific region 
1. Legs I 7-segmented, II and III 6-segmented, tarsal claws simple, no empodium. 2 
Legs all 7-segmented. Tarsal claws variable 4 
2. Scutum triangular, with pronounced snout-like anterior process bearing the two AM 
setae. Setae on coxae II and III and on femur of palpi normal. Sensillae 
filamentous and nude. Palpal claw bifurcate, tarsus small. 
Gen. Cockingsia nov. 
Scutum without any anterior process 3 
3. Scutum wider than long, more or less rectangular. Coxae II and III as well as maxillae 
and femora of palpi with short claviform peg-like setae. AM and AL setae also 
claviform and peg-like. Sensillae long and narrowly lanceolate with fine indistinct 
ciliations. Palpal tarsus apically with 2 long strong spines. 
Gen. Audyana nov. 
STUD. INST. MED. RES. 
