238 MR. R. SHELFORD ON MIMETIC INSECTS AND [Nov. 4, 



never been figui-ed. Such species have been inckided in the 

 appended tables, when their descriptions have shown that they do 

 not difi'er in characters of mimetic importance from the closely- 

 allied species with which I am acquainted ; in every case these 

 are marked with an asterisk. I have not included a large 

 concourse of species belonging to the subfamilies Afesosince and 

 Apomecynince, which present in their general facies a marked 

 resemblance to the Rhynchophora, for, although the tyro in 

 entomology might readily mistake many of these longicorns for 

 Rhynchophorous species, I have, nevertheless, found it quite 

 impossible to pair any one given species with a definite model. 

 The resemblance is in fact, as is so frequently the case, general 

 and indefinite, not special as, for example, in the species of the 

 subfamilies Astatheince and Scqyerdince, which mimic for the most 

 part definite species of the Phytophaga. It will therefore suffice 

 if I simply enumerate here those genera of the Mesoshus and 

 A'pomecynince which present most markedly Rhynchophoi-ous 

 features : — 



Subfam. MesosincB : — Anancylus, Planodes, Breis, Cacia,Mnemea, 

 Sorhia. 



All these Coleoptera, more especially Ereis anthrihoides (Pasc), 

 have a general resemblance to Anthribidse. 



Svibfam. Ajyomecynince : — Cenodocus, Synelasma, Etaxcdus, 

 Phesates, Praonetha, Syhra, Ropica. 



These bear a general resemblance to Curculionidfe. 



Notes on Table I. — Longicorns mimicking Hymenoptera. 



The subfamily Phytceciince furnishes ten and probably more 

 species belonging to three genera which mimic the Braconida\ 

 The models can be divided into two sections: — (1) species with 

 dark red head and thorax and black abdomen and wings (genus 

 Myosoma); (2) reddish-ochreous species (genus Iphicmlax), one 

 of which has already been shown to be mimicked by Mantispcc 

 simulatrix. Scytasis nitida (Pasc.) and four species of Oherea 

 are coloured in identically the same way as their models, the 

 red-and-black Braconids. Furthermore, *S'. nitida and three out of 

 the four species of Oherea (the exception being 0. ruhetra (Pasc.)) 

 are marked with a large white patch of pubescence on the sides 

 of the first and second abdominal segments, which patches, when 

 the beetle is seen in profile, give an impression of a wasp-like 

 waist, from the posterior end of which the abdomen appears 

 gradually to swell in size. This eflfect is shown in Plate XIX. 

 figs. 13, 14, & 15, representing respectively Oberea slrigosa (Pasc.) 

 var., 0. hrevicollis (Pasc), and Oherea probably n. sp. near strigosa 

 (Pasc). The thin waist of the model is not seen from above when 

 the insect is at rest, being hidden by the laid-back wings, and 

 consequently this obviates the necessity of dorsal white patches 

 on the mimic as in the African Locustid Myrmecophana fallax, 

 whose model is a wingless ant with an abdominal peduncle plainly 



