510 Mr. Orcs Donisthorpe’s 
which having longer legs than the larva of the latter, can 
walk about and solicit the ants for food by raising itself and 
stroking their cheeks with the anterior pair of feet. 
7. Mimicry of ants by other Arthropods which live with 
the ants, and lay their eggs in them or their brood— 
Myrmecoid Entoparasites. “Mann records the capture in 
Brazil of several specimens of a remarkable wingless 
Proctotrypid—Mimopria ecitonophila, which runs about 
in company with the legionary ant Heiton hamatum. They 
were good mimics of the small workers, and very ant-like 
in their movements. Chitty found in a nest of Tetra- 
morium caespitum in Kent a wingless Proctotrypid which 
resembled very closely this ant. This section also includes 
various other mimetic Proctotrypidae, and probably also 
some ant-like Ichneumonidae of the genus Pezomachus, 
which are found with ants. 
8. Mimicry of ants by other ants of different genera— 
Myrmecoid Formicidae. Forel has commented on the 
close superficial resemblance between the minor workers of 
Colobopsis truncata and workers of Dolichoderus 4-punctatus, 
considering the likeness to be due to mimicry. These forms 
of the two species resemble each other in size, gait, and 
behaviour; both have spotted gasters, bemg the only 
European ants with such markings, and both often occur 
together on walnut-trees. Moreover, Camponotus lateralis 
may also be found with the other two species which they 
resemble in general colouring and behaviour. Finally, all 
three sometimes inhabit the same tree as Cremastogaster 
scutellaris and may be looked upon as mimics of the latter 
ant. I found the Colobopsis and the Cremastogaster living 
in the same pieces of “ virgin” cork at Kew Gardens 
accompanied by a beetle Formicomus pedestris which 
closely resembled the Colobopsis. It has been suggested 
that these resemblances are only accidental, but this 
conclusion is by no means certain. Ants of the genus 
Dolichoderus possess well-developed repugnatorial glands, 
and the numerous species of Cremastogaster are dreaded by 
other ants. Mann has observed that the Cremastogasters 
are always avoided by the fierce Brazilian Ecitons, even 
when marching in column. 
Santschi has shown that the female of Bothriomyrmex 
decapitans possesses a similar odour (not present in her 
own workers) to that possessed by the workers of Tapi- 
noma nigerrimum, on which she is a temporary social 
