ART 18 



DIPTERA OR TWO-WINGED FLIES — ALDRICH 11 



Length 8.4 to 10.4 mm. 



Three males, one female, Cairns, North Queensland, Australia, 

 collected by A. P. Dodd and J. F. Illingworth. Two males are 

 returned to Dr. Illingworth, after whom I name the species. 



Ty'pe.—M2lQ, Cat. No. 26840, U.S.N.M. 



Family CALLIPHORIDAE 



Genus MESEMBRINELLA 



Mesembrinclla Giglio-tos, Bull. Mus. Zool. ed Anat. Comp. R. Uciv., 



Torino, vol. 7, No. 132, 1892, p. 4; Mem. R. Acad. Sci., Torino, ser. 2, 



vol. 45, 1895, p. 11.— Aldkich, Proc. U. S. Nat. Mus., vol. 62, art. 11, 



1922, p. 8. 



An interesting character of the genus not previously mentioned 



is the existence of a post-scutellum, the absence of which has been 



considered a family character in Calliphoridae and Sarcophagidae. 



As here developed, however, it is much less bulging than in Dexidae 



and Tachinidae. 



The discovery of four new species in collections submitted for 

 identification by Prof. A. L. Melander makes a new analytical table 

 of the genus desirable. For convenience it is put in the same form 

 as the one previously published by me. 



ANALYTICAL TABLE OF THE GENUS MESEMBRINELLA 



A\ Stem- vein bare (subgenus Mesembrinella). 

 a\ Two presutural bristles present. 



b\ Legs almost black, but middle and hind femora yellow on apical half. 



&. Wing with heavy subcostal black stripe not reaching the third vein, 



the posterior portion paler; 3 posterior acrostichals (Bolivia 



Surinam) brunnipes Surcouf. 



c^ Wings deep brown, the second fourth except behind yellow (Bolivia). 



pictipennis Aldrich. 



b'. Femora and tibiae yellow. 

 c\ Apical cell very wide open, the included costal section more than half 

 as long as the preceding one (Costa Rica, Ecuador). 



umbrosa Aldrich. 



(;^ Apical cell less widely open, the included costal section less than half 

 the preceding one. 

 d\ Wing with only diffuse and not very strong infuscation (wide- 

 spread neotropical) bicolor Pabricius. 



d\ Wing with heavy blackish subcostal stripe, beyond middle, before 



third vein (Brazil) batesi Aldrich. 



a'. Only one presutural present. 



b\ Fourth abdominal segment with a discal row of bristles. 

 c". Femora, pleurae, and abdomen bluegreen or blackish ; 2 pairs acrosti- 

 chals before suture. 

 (f. Discal scutellar bristles small, almost in line with the much larger 

 basal lateral pair ; female with but one pair of proclinate orbitals, 

 which are almost in the frontal row (Costa Rica). 



uniseta, new species. 



