with remarks on some aberrant genera of the Scoliidm. 81 



far from the margin of the head as from each other. Pronotum 

 narrower than the head, more than half as long as the mesonotum, 

 the anterior margin straight and very strongly raised. Thorax 

 punctured ; the scutellum subtriangular, narrowly truncate at the 

 apex. Median segment scarcely more than half the length of the 

 mesonotum, nearly twice as broad as long, obliquely truncate pos- 

 teriorly, punctured, with a small depression at the base. Abdomen 

 shining, almost smooth, subcylindrical ; the second and third seg- 

 ments transversely depressed at the base ; the apical segment large, 

 the hypopygium rounded and ciliate at the apex, not projecting be- 

 yond the epipygium ; the first ventral segment subtuberculate near 

 the base, shallowly divided from the second segment. 



Black ; the antennse fusco-ferruginous ; the mandibles, clypeus, 

 the anterior margin of the pronotum broadly, a large round spot on 

 the scutellum, the femora, tibise and tarsi light yellow. 



Length 8-9 mm. 



Rah. Adelaide River, Northern Territory, S. Australia. 

 Type in B. M. 



Allied to U. scutellata, Turn., but differs in the shape of 

 the head, clypeus, median segment and abdomen. 



Family SCOLIIDiE. 

 Genus Isivara, Westw. 



Isivara, Westw., Trans. Ent. Soc. London (2), i, 7, p. 232, 



1851. 

 -Sj97?iarowm, Radosz., Horae Soc. Ent. Ross., xx, p. 41, 1886. 

 Mcria, section Komarovia, Sauss., Grandid. Hist. Madag., 



XX, p. 249, 1892. 



The males of this genus are closely allied to those of 

 Myzine proper, from which the genus is almost undoubtedly 

 derived by adaptation to nocturnal habits and desert con- 

 ditions. Saussure does not consider that the genus can be 

 separated from Myzine {Me rid), but the male of Myzine 

 tripimctata, Ross, has the palpi normal, whereas in Iswara 

 the maxillary palpi have only three joints in place of six, 

 and the labial palpi three joints instead of four. The 

 antennse are also very much longer and more slender, and 

 the neuration does not extend to the margin of the wing. 

 The latter point, however, is not of very much importance, 

 as Myzine {Meria) timurella, Sauss., also shows this peculi- 



TKANS. ENT. SOC. LOND. 1908. — PART I. (MAY) 6 



