244 MR. R. SHELFORD OX MIMETIC INSECTS AXD [NoV. 4. 



XXIII. fig. 40, no. 17 in Table I.), with its swollen pedunculate 

 posterior femora and white-tipped wings, resembles very closely 

 the common little Dammar-bee Melipona vidua (Lepel.) (Plate 

 XXIII. fig. 41); it is remarkably active on the wing and has 

 doubtless often been passed over by collectors, the least important 

 of its foes. U. saratvakensis (18) Wallace found crawling on 

 timber, and stated " that they were remarkably ant-like " ; in 

 this species the posterior femora are not swollen. 



Of the Tillomorphince, Clytellus westwoodi (20) and Halme 

 cleriformis (19) are almost indistmguishable from ants. 



Notes on Table II. — Longicorns mimicking other Coleoptera. 



Excluding, for reasons already mentioned, the subfamilies 

 Mesosince and Apomecynince^ it will be seen that the Saperdince 

 and Astatheince are essentially the mimetic subfamilies in this 

 section. Most of the species are extremely common and highly 

 consj)icuoiis, and I have little doubt but that all are distasteful, 

 and therefore furnish examples of synaposematic coloration 

 (Miillerian mimicry). All the species of the genus J^ntelopes are 

 mimetic. J^. glauca (Guer.), red with black spots (Plate XXIII. 

 fig. 32), is quite Ooccinellid in appearance (compare fig. 30), 

 though more by virtue of its markings than of its shape. This 

 association of red colour with black spots is so typically a warning 

 coloration, as exemplified by scores of species of CoccineUidse, 

 that it is impossible to regard the same pattern on a Longicorn 

 as anything but pseudaposematic or synaposematic. Entelopes 

 n. sp. near tvcdlacei (Pasc), an entirely reddish-fulvovis species, 

 has as its model similai-ly coloured species of the family Galeru- 

 cidse, Metrloidea apicalis (compare figs. 13 & 14, Plate XX.), 

 which, as will be seen, serves also as model for two species of the 

 Astatheince. Entelopes iojjtera (Pasc), with its yellow prothorax 

 and blue elytra, and EntelojMs amoena (Plate XX. fig. 26), with 

 reddish prothorax and blue elytra, also find parallels amongst the 

 distasteful Galerucidse (see the accompanying Table, pp. 242, 243 ; 

 also Plate XX. fig. 25). Serixia modesta (Pasc.) and *S'. lychnura 

 (Pasc.) are unlike any distasteful species with which I am ac- 

 quainted ; the closely-allied S. pn-olata (Plate XX. fig. 12) and 

 h. aurulenta (Pasc.) mimic a small reddish-fulvous Galerucid, 

 jEnidia sp. (Plate XX. fig. 11). The genus Xyaste is interesting 

 as it mimics beetles of quite a different nature — the Lycidse, 

 whose distastef uhiess I have proved by repeated trials with various 

 small mammals and birds. Xyaste is generically sej)arated from 

 Serixia by the thickened and pilose basal joints of the antennae ; 

 the remaining joints, being of exceeding fineness, are more or 

 less inconspicuous ; and it is by this means that the thickened, 

 flabellate, and short antennse of the Lycidse are simulated, whilst 

 Ephies dilaticomis (Plate XXIII. fig. 18) and Erythrus apicu- 

 latus var. (Plate XXIII. fig. 8), also mimetic of Lycidse, have the 

 aiitennfe shortened and dilated in almost the same manner as their 



