312 Professor E. B. Poulton on 
Promachus xqualis (Nos. 95-101) is probably an im- 
perfect mimic of the white-banded Yylocopide ; but with 
the exception of the winged Termites and the male of its 
own species, its victims (4) were all Coleopterous. Hence 
if a mimic at all it must be classed with Asilus erabroni- 
Jormis (Nos. 149-156). The second column of the table 
includes a fine species, testaceipes? (No. 117), from Macao, 
probably mimetic of a wasp. Its prey is insufficiently 
known, but must include one, perhaps two wasps, although 
apparently not the model, and may include a Cicada, 
The tolerably indiscriminate list of victims in this column 
seems however to indicate an undoubted preference for 
Dragonflies and Cicadas, inasmuch as the majority of 
the records of these insects are here to be found. 
Philodicus, Alcimus and Apoclea (Nos. 122-140).—We 
here encounter the most obvious preference for a particular 
diet to be met with anywhere among the Asilidx, except 
in those specialized forms which prey upon their models. 
Omitting the doubtfully determined Philodicus sp., which 
had attacked a Tachinid fly, the prey of the remaining 
species of these three genera is tabulated below :— 
The Prey of Alcimus and allied genera. 
ORTHOPTERA, <Acridiidz ee ee 
LEPIDOPTERA Lymantridx i as. 
HETEROCERA “Mie hh oH ; 
Pyralidez 1 ee 
TEEIDOET ERAN pill ivimpnai® Tain) |) na 
RHOPALOCERA Dyan a f ly 
Pierine 3 lor2 | 
Totals 15 lor2) 1 
When this table is compared with the general analysis 
of prey (pp. 359, 361), the preference for Lepidoptera and 
Orthoptera will be seen to be remarkably clear. As re- 
