ON THE INSECTS FROM NEW BRITAIN. 383 



are of some interest as they exhibit no sign of the secondary projection on the 

 lower horn, that is invariably found on the specimens of A'', gideon from India and 

 Java. It i.s not possible in the present state of our knowledge to form an opinion 

 as to whether these examples are a different species or not. M. van Lansberge has 

 described a Dynastid fi'om the island of Flores (Endebiiis florensis) the male of which 

 is said to be very similar to that sex of Xylotrupes gideon, while the female is so 

 different that van Lansberge has proposed a distinct genus for the species. Dr Willey 

 brought back only one female ,that could possibly be the other sex of the male we 

 are discussing, but there is no certainty that it is so, and if the two insects are 

 really the sexes of one species, it is clearly not X. gideon. 



We have figured the profile of the head and thorax of a Javanese example of 

 X. gideon (Plate XXXV. Fig. 2) for comparison with our New Britain insect. 



Family MALACODERMIDAE. 



There have long been known to entomologists some extremely remarkable larvae 

 that probably are those of Lampyrides, or Lycides, though none of them have been 

 satisfactorily identified '. 



Dr Willey procured a most remarkable form of this kind, bearing long abdominal 

 processes, that are segmented or articulated at the base (Plate XXXV. Figs. 4, 4 a, 

 4 b). I take this opportunity of drawing attention to these forms with the hope that 

 some one may soon be able to give us some further information about them. Although 

 the larvae I have mentioned as being presumably those of Lamp}Tides or Lycides, are of 

 very diverse forms, yet they all have a head with well-developed mouth-parts, and capable 

 of being retracted into the tubular cavity placed underneath the shield-like prothorax. 

 They have also well-developed prothoracic legs terminated by a single claw. It is probable 

 that they may prey on Mollusca. 



Family CERAMBYCIDAE. 



Arrhenotus willeyi, n. sp. Plate XXXV. Fig. 5. 



Niger, parum nitidus, pube albicante variegatus, in elytris fasciis duabus flammulatis; 

 prothorace, utrinque biaugulato, tuberculo inframarginali, elongate, acuto. Long. iO — 

 2-5 mm. 



Head a good deal narrower behind the eyes, sparingly and in-egularly punctate, 

 variegate with a few white spots. Thorax strongly transverse, a good deal narrower 

 than the elytra, dorsum a little uneven, irregularly and variably spotted w itii white : 

 on each side the margin forms in front a well-marked ])rominent angle, and in the 

 middle a much more obscure obtuse angle ; below the margin there is an acute spine, 

 white above, black below. Scutellum white on each side, black in the middle. Elytra 

 much pnjduced on each side of the scutellum, and with a small angle projecting inwardly 



' It appears probable tliat n fossil larva of this group has buen mistaken for a Crustacean allied to 

 Apodidae. Cf. (iahan, Xaturnl Seifm-i', xii., 1898, p. 42. 



52—2 



