Johnstonianidae — - Newell 
465 
Figs. 262-266. Lassenia scutellata n. sp., larva: 262, leg I, trochanter-tibia; 263, leg II, trochanter- tibia; 264, leg 
III, trochanter-tibia; 265, palp, posterior; 266, dorsal eupathid, famulus, and companion seta, tarsus I. 
inences from which arise plain setae.” Worn- 
ersley pointed out in his remarks that the 
presence of two pairs of sensilla on the scutum 
indicated a relationship to Diplothrombium and 
also to Johnstoniana (= Rohaultia). However, 
a study of his figure of the scutum shows that 
this is in no way similar to the scutum of 
either Diplothrombium or of Johnstoniana. In 
fact it is very suggestive of the scutum of 
Erythraeidae such as Balaustium . Likewise the 
sharply cutoff form of the tarsus, with the 
distal face of the tarsus nearly vertical is not 
found in any Johnstonianidae known to the 
writer, but is found in some of the smaller 
Erythraeidae. Again, the setae are quite elab- 
orately pectinate, which is also unlike the 
Johnstonianidae, in which the setae of the 
body are generally smooth and borne on 
elevated alveoli. The single eye is also more 
characteristic of certain of the Erythraeidae 
than the Johnstonianidae. The association of 
the type species with ants would also be quite 
unusual for the Johnstonianidae which are 
largely subaquatic, and are normally found 
only in very wet situations which would be 
incompatible with ant nests. In view of these 
considerations it is the feeling of the writer 
that the genus Myrmicotrombium does not be- 
long in the Johnstonianidae, but rather in the 
Erythraeidae. A study of the chelicerae of the 
type species would resolve this question; un- 
fortunately Womersley did not describe these. 
The type species, Myrmicotrombium brevicrista- 
tum Womersley 1934 is known from a single 
