44 INSECUTOR INSCITI^ MI^NSTRUUS 



Segment 7, length 0.009 mm. 0.009 mm„ 



width 0.006 mm. 0,006 mm. 



Segment 8, length 0.014 mm. 0.014 mm. 



width 0.005 mm. 0.005 mm. 



Prothorax, length 0.120 mm. 0.114 mm. 



■ width 0.204 mm. 0.198 mm. 



Pterothorax, width 0.258 mm. 0.248 mm. 



Abdomen, width 0.312 mm. 0.304 mm. 



Professor Renter's failure to recognize O. erica (then com- 

 monly known as O. parviceps) among the specimens before 

 him, and his assignment of piceicornis to the genus Thrips 

 (which has only seven segments in the antennae) finds a ready 

 explanation in his method of preserving material dry, fastened 

 to small cards on insect pins, instead of on miscroscope slides. 

 Dried specimens are frequently collapsed or otherwise dis- 

 torted, and the antennal segments are almost invariably more 

 or less telescoped, one within another. 



ON AUSTRALIAN MUSCOIDEA, WITH DESCRIP- 

 TION OF NEW FORMS 



By CHARLES H. T. TOWNSEND 



Bumusca australis Mcq. — Specimens of both sexes from 

 Narrabeen and Bourke, New South Wales (Froggatt), as 

 well as numerous specimens from Guam (D. T. Fullaway), 

 I identify as Macquart's Muse a australis, which is evidently 

 Bumusca. This is the species mentioned and figured by Frog- 

 gatt (Agric. Gaz. N. S. W. XVI, 19, f. 5) as Musca corvina. 



Pseudorthellia, new genus. 



Genotype, Lucilia viridiceps Mcq., 1851, Dipt. Ex. Suppl. IV 

 (2), 322. East coast of Australia. 



DiflFers from Orthellia as follows : Male eyes nearly or quite 

 contiguous. Female parafrontals and parafacials narrow, 

 front less than eye-width. Male parafrontals and parafacials 

 linear. Apical crossvein not bent in near origin. 



