74 'Sir. n. E. Turner on Fosaorinl Ilijmonnptera. 



^Nrcsonotum sliullowly punctured ; a distinct Ibveolate 

 transverse groove at the base of the sciitcUum. Scutellum 

 and postsciitelkim closely lonp;itudinaliy striated ; basal 

 area of mcdiau segment strongly ol)li(|ucly striated, the 

 sides of the segment coarsely rugose. Abdoraeu narrowed 

 at the base, the first segment about half as broad at tlie 

 apex as the second, seventh dorsal segment small, broadly 

 rounded at the apex ; second ventral segment not angular 

 at the base. Ventral segments without eiliie of long hairs. 

 Fore tarsi not ciliated, intermediate tibicC with one long 

 apical spine, the second spine very short and slender, hind 

 tibite feebly serrate. Second abscissa of the radius very 

 short, about one quarter of the length of the third, first 

 transverse cubital nervure bent sharply outwards near the 

 cubitus and emitting inwards a short spurious vein, both 

 recurrent nervures received by the second cubital cell far 

 apart. Cubitus of the hind wing originating at a distance 

 beyond the transverse median nervure about half as great 

 again as the length of that nervure. 



Hnb. Mordialloc, Victoria {Spnj). 



This belongs to the ciliatus group, differing from most 

 species of that gi'oup in the structure of the antennae and 

 in the absence of long ciliaj on the ventral segments. 



Arpactus obesus, sp. n. 



^ . Niger ; scapo subtus, prouoto linea utrinque ; segmentis dorsali- 

 bus prinio tertioque fasciis apicalihus interruptis, secundo macula 

 apicali utrinque, femoribus anticis subtus, tibiis anticis, tibiis 

 intermediis ct posticis basi,tarsis anticis, tarsisque iutermcdiis et 

 l)Osticis articulis 4 basalibus dimidio basali flavis ; alls hyalinis, 

 venis fuseis. 



$ . Mari sirailis; segmentis dorsalibus tertio quartoque fascia con- 

 tinua apicali, quinto macula parva flavis ; flagello subtus fusco- 

 ferrugineo. 



Long., 6 7 mm., $ 8 mm. 



(J . Eyes convergent towards the clypeus^ separated at 

 the base of the antennre by a distance more than half as 

 great again as the length of the scape ; apical joint of the 

 flagellum strongly curved, no longer than the penultimate, 

 which is subtuberculate at the base. Posterior ocelli nearly 

 twice as far from each other as from the eyes ; a small 

 tubercle between the antennse ; a shallow frontal sulcus 

 reaching the anterior ocellus. Head and thorax punctured, 

 the groove at the base of the scutellum fovcolate ; post- 

 scutellum lon^itudinallv, basal area of the median segment 



