19 



Indicate even less generic affinity to the Ponerinae as a 

 subfamily than is exhibited by many Eucamponotine genera. 

 It may, perhaps, be advisable to make a special Camponotine 

 section for the accommodation of the genus Bfyrmoteras, but 

 to name this section "Procamponotinae" is, to say the least, 

 misleading. '" 



Andre, from a study of his single minor worker, con- 

 cluded that Myrmecorhynchus "bears a certain resemblance 

 to the Oecophyllas, in the neighbourhood of which it should 

 probably be placed." Forel seems to have accepted this posi- 

 tion as established, since, as we have seen, he places the 

 genus, together with Gigantiops and Oecoph ijlla in the 

 Oecophyllini, his fourth tribe of Eucamponotinae, character- 

 ized by having "the gizzard long and narrow, with straight 

 calyx." Such a gizzard is, of course, found in Oecoph ylla and 

 Gigantiops, as shown in fig. 3, but the gizzard calyx of 

 Myrmecorhynchus , as I have endeavoured to show in fig. 2, 

 is entirely different. There is, to be sure, as Andre main- 

 tained, a certain resemblance between Myrmecorhynchus and 

 Oecoph ijlla in the shape of the head, particularly of the 

 mandibles and clypeus, and of the thorax; but this re- 

 semblance is apparent only in the worker minima of the 

 former genus. M. emeryi is, moreover, terrestrial, whereas 

 the species of Oecoph yHa and Gigantiops are arboreal. One 

 who had first seen the large workers of Myrmecorhynchus 

 would be inclined to place it near Camponotus, both on 

 account of the shape and structure of the head and of the 

 pronounced polymorphism of the worker. But the genera of 

 the tribe Camponotini also have a gizzard with long, narrow, 

 straight sepals, and the clypeal and antennary fossae are non- 

 confluent. One meets with no better success in endeavouring 

 to fit Myrmecorhynchus into other tribes in Forel's scheme. 

 We are compelled, therefore, either to establish a new tribe, 

 Myrmorhynchini, in the section of Eucamponotinae, for its 

 reception, or to leave the position of the genus undecided till 

 the male and female of its single species have been discovered 

 and studied. 



EXPLANATION OF PLATE I. 



Fig. 1. Myrmecorhynchus emeryi, Ern. Andre, a, worker 

 maxima, lateral view; b, head of same, dorsal view; e, head of 

 worker media; d, head of worker minima. 



Fig. 2. Myrmecorhynchus emeryi, Ern. Andre. Proventriculus 

 from the side. 



Fig. 3. Oecophylla smaragdina, Fabr. Proventriculus from 

 the side. 



Fig. 4. Myrmecorhynchus emeryi, Ern. Andre. a, young 

 larva, lateral view; b and c, branched hairs of same; d, adult 

 larva; e, head of same, dorsal view; /, mandible of same. 



