( cxlii ) 



pattern. These would doubtless serve as models when on 

 the wing, but there can be no doubt that smaller species 

 with the pattern of the Glyptomorpha exist in the locality 

 where the Dirphyas were taken. Dr. Marshall shows in 

 fig. 62 a Reduvid bug with the most wonderful mimetic 

 likeness, at rest as well as in flight to the Parasitica of figs. 

 59-61. 



From these last species of Dirphya, Lycoid at rest, Braconid 

 in flight, we pass to two species of the allied Lamiid genus 

 Oberea, of which the first is doubtfully Lycoid, the second 

 certainly not, being Braconoid at rest as well as in flight. 

 Two males of the first, 0. sp., probably ventralis, Gahan, 

 taken Nov. 22 and Dec. 26, both bear notes recording that 

 they were " caught on the wing as Braconids " ; a third male 

 of Jan. 1, 1918, was " very Braconoid on wing." The pattern 

 is very similar to that of the Dirphyas save that the anterior 

 orange-ochreous is so much reduced that any direct mimetic 

 likeness to the Lycidae is doubtful, although a place on the 

 out ski its of this dominant combination is probably advan- 

 tageous. In the second species Oberea sp. very near scuteUaris, 

 Gerst., <J, the pattern is similar but the anterior colouring 

 red instead of orange-ochreous, bringing about a close resem- 

 blance, especially on the wing but also at rest, to the black 

 and red Braconidae. The beetle was "taken for Braconid 

 on wing,'" the model, a species of Ipkiaulax near coccineus, 

 Brulle, being sent with it, both captured Apr. 15, at Itigi. 

 Three species of Braconidae with this pattern, including 

 coccineus, together with the mimetic Oberea scuteUaris, Gerst., 

 and Reduviid bug Callilestes bicolor, Dist., are described and 

 shown by Dr. Marshall on p. 533 and in his pi. xviii, figs. 

 53-58. 



The resemblance of Bornean Longicornia to Braconidae is 

 deall with in detail by the late Mr. R. Shelford, who gave a 

 list of 12 species of Phytaecinae, including 9 Obereas, that 

 are mimetic in this way (Proc. Zool. Soc, 1902, pp. 238-40). 



The next letter, written in January from Dar es Salaam. 

 gave an account of a visit to Lake Tanganyika after Capt. 

 Carpenter had been relieved from Ins post at Lulanguru :— 



'" Here 1 am at last in Dar es Salaam, with, so far as I 



