324 ENTOMOLOGICAL NEWS. [Dec, '03 



black, in the larger specimens black-brown, varying to color of succeed- 

 ing joints ; abdomen darker ; face with prominent median carina. 



Antennial joints cylindrical oval, i and 2 at least darker than succeed- 

 ing joints ; i and 3 swollen at distal end ; antennae, 14-jointed. 



Described from 13 specimens. 



42 specimens : 13 ^ 's, 29 9 's. 



Resembles Rhodites and Diastrophus, but differs from the 

 former in having the marginal cell open, antennae of male 14- 

 jointed, hypopygium blunt, and ventral spine very long ; from 

 Diastrophus, in having claws apparently entire, and mesotho- 

 rax not polished, but rugose. Naturally falls into Ashmead's 

 new tribe, Aulacini, occurring in galls on Composites, and thus 

 easily separated from the foregoing genera. 



Parasites numerous, mostly of the Chalcid genus Eurytoma. 



I am indebted to Mr. Wm. H. Ashmead, U. S. N. M., for 

 information bearing on this species, and for confirmation of its 

 generic position ; also for determination of some of its 

 parasites. 



Credit is due also to Mr. J. F. Strauss, Blacksburg, Vir- 

 ginia, for the figure. 



A New Ephydridid from Australia. 

 By D. W. Coquillktt. 



Hydrellia tritici n. sp 



Head black, the face, cheeks and lower part of occiput white pruinose, 

 a row of four bristles on lower part of each side of face and the adjoin- 

 ing cheek, antennae and palpi black, proboscis brown ; thorax -and scu- 

 tellum greenish black, mesonotum not pruinose, two pairs of dorso- 

 central bristles, the hairs between them arranged in two rows, a velvet- 

 black spot above insertion of each wing, pleura and metanotum, except 

 lower edge of the latter, white pruinose ; abdomen bronze-green ; legs, 

 including the coxae yellow, the front onej^, except their coxae and bases 

 of their femora, black ; wings hyaline, apex of second vein nearly three 

 times as far from apex of first as from that of the third ; halteres yellow. 

 Length, 2 mm. 



Perth, Western Australia. A specimen, bred from a wheat 

 plant, received from the Acting Director of Agriculture. Also 

 three specimens from Mittagong, Australia, received from Mr. 

 W. W. Froggatt. T3^pe, No. 7,003, U. S. National' Museum. 



