290 MEMOIBS OF THE QUEENSLAND MUSEUM. 



short golden hair ; clypeus transverse, shallowly emarginate at the base, more- 

 sparselv punctured than the rest of the head, a transverse sulcus at the base of the 

 scutellum coarsely longitudinally striated ; scutellum large, oblong, the basal and 

 apical sides parallel, finel}' punctured except a small bare part in the centre ; basal 

 area of median segment Avith coarse longitudinal striae, Avhich are slightly deflected 

 at the boundary, but continue over the dorsal surface ; sides of median segment 

 with longitudinal strise. First abdominal segment narrowed at the base, slightly 

 constricted at the apex, and rather coarsely punctured, the third, fourth, and fifth 

 segments clothed with hght pubescence ; pygidial area triangular, shining, and 

 sparsely punctured. Fore tarsi with short weak cilia, intermediate tibiae with two 

 equal apical spines, hind tibiae with a few minute spines. First, second, and third 

 abscissae of the radius of equal length. 



Black ; the two basal joints of the antennae, clypeus, labrum, mandibles at 

 base, broad upper margin of prothorax, tubercles, large wedge-shaped area on pleura, 

 and a stripe on each side on the mesonotum, yellow ; scutellum yellow at sides, 

 leaving a large black triangle in the middle ; postscutellum yellow with a black 

 triangular mark in the centre, and separated from the median segment by a black 

 line ; the basal area is yellow very distinctly outlined on the sides with a black 

 line, a central black stripe commencing at the postscutellum passes through the 

 basal area and continues to the end of the median segment ; this stripe and the 

 line between the postscutellum and the basal area make a conspicuous black cross ; 

 sides of median segment yellow ; the apical half and sides of first abdominal 

 segment, apical margins of the remaining segments (narrowest on the second) 

 yellow ; antennae and pygidial area ferruginous ; the outer sides of anterior and 

 intermediate tibiae and tarsi yellow ; the inner sides and the posterior legs 

 ferruginous. Wings brownish hyaline, the radial all brown, stigma ferruginous, 

 nervures dilute fuscous, tegulae testaceous. 



The venation resembles that of A. rufomixtus Turner, but the second 

 recurrent nervure bulges more outwardly. The basal nervure meets the nervulus. 



Hob. — Brisbane {Hacker), November. 



ARP ACTUS RUFOMIXTUS Turn. 



Male. Length 7 mm. The underside of the scape is yellow, the clypeus is 

 yellow with a narrow testaceous line on the apical edge ; the face below insertion 

 of antennae is clothed with light silky hair ; other markings as in the female. 



.&a6.^Enoggera, near Brisbane {Hacker). Both sexes bred from oval 

 cocoons which were dug out of a sandy bank. This sex has not previously been 

 described. 



The use of Arpactus for these insects depends on the acceptance of the 

 '• Erlangen hst." For the present Ave follow the usage of Turner, who revised the 

 Australian species. The other alternative, following the laws of priority, would 

 be according to Morice and Durrant Ceropales Latrielle, which is current for quite 

 a different sort of insect, but Rohwer maintains Ceropales in the usual sense (J. Ac.^ 

 Washington, vol. 10, p. 176). 



