Australian and Tasmanian Malacodermidae. 97 



moderately ti'ansverse ; 3-areolate ; apical angles somewhat obtuse, 

 apex itself produced in middle, basal angles obliquely produced and 

 subacute ; sides and apes strongly punctate ; median ariolet con- 

 tinuous to base and apex, but its walls highest in middle. Scutellnm 

 transverse, slightly increasing in width to apex, which is rather 

 feebly emarginate. Elytra narrow, parallel-sided ; each tricostate 

 (at base quadricostate), the interspaces each with two regular row s of 

 rather large rectangular punctures separated by small ridges, sutural 

 costa trifurcate towards base, with its middle arm much thickened 

 at base. Abdomen with the penultimate segment semi-circularly and 

 not deeply excised. 

 Length 11 mm. 



Hah. Queensland : Kuranda (type in H. H. D. 

 Griffith's collection). 



In colour this species closely resembles M. {Xylohanus) 

 ampliatus, Macl. ; but the two species have scarcely any- 

 thing else in common. The two colours are sharply 

 defined at about the middle of the body. This and the 

 following are the only species of Trichalus yet known in 

 which the antennae are supplied with long rami ; these 

 are very long and thin, that on the 3rd joint is placed 

 nearer its base than apex, in the others it is gradually 

 extended along so that on the 10th it is placed nearer the 

 apex than the base. The rami are so thin that in the 

 specimen before me they have become more or less twisted 

 in drying up. 



Trichalus flabellicornis, n. sp. (Figs. 28, 29.) 



^ . Black ; prothorax (in places infuscate), scutellum and basal 

 two-thirds of elytra testaceous. 



Eyes very large. Antennae strongly flabellate, extending to black 

 portion of elytra, 2nd joint distinct, 3rd slightly longer than 4th, its 

 ramus about once and one-half its own length ; of the 4th-9th 

 almost or more than twice the length of the joint. Prothorax and 

 elytra much as in the preceding species except that the prothorax 

 has the anterior angles less obtuse, the apical portion more produced, 

 the posterior angles more acute and the median ariolet rather sud- 

 denly narrowed in front ; the elytra are almost exactly the same. 

 Abdomen with the penultimate segment rather more narrowly (but 

 not so deeply) excised than in the preceding species. 



Length 12 mm. 



Hah. Queensland: Brisbane (type in R. IlHdge's 

 collection). 



TRANS. ENT. SOC. LOND. 1909.— PART I. (MAY) H 



