18 PROCEEDINGS OF THE NATIONAL MUSEUM vol. 68 



The above description is given to place upon record the essential 

 features not in the original description. From this species punctifer 

 Malloch differs in having the thoracic dorsum with brown dots at 

 bases of the bristles and hairs. In other respects the two are very- 

 similar. 



MINETTIA FRONTALIS Macquart 



I identify as this species two .specimens with the following charac- 

 ters: General color fulvous yellow, Frons with a velvety black 

 triangular spot on each side between the shining orbits and eyes, the 

 anterior margin of which is a little proximad of the anterior orbital 

 bristle ; orbits and triangle almost glossy, the latter extending almost 

 to anterior margin, the interfrontalia on each side of it opaque 

 brownish. Thorax immaculate. Abdomen with blackish hind mar- 

 gins to tergites, the apical two or three tergites each with a dark 

 central mark. Apices of hind tibiae slightly browned. Costal mar- 

 gin dark brown, more broadly so from opposite inner cross vein to 

 beyond apex of fourth vein, the dark color on apices of third and 

 fourth veins slightly divided by a longitudinal hyaline streak in- 

 wardly; both cross veins broadly dark brown, and fifth vein faintly 

 clouded. 



Ocellar bristles short and fine; postverticals long; arista plumose. 

 Thorax as in last species. Mid tibia w4th 3-5 short posterior bristles. 

 Venation of wings as in last species. 



Length 6-6.5 mm. 



Localities, Tucurrique, and Carillo, Costa Rica (Schild and Burg- 

 dorf). I am not certain of the identity of this species because Mac- 

 quart's description leads one to expect that his species has a short 

 villose arista, and he gives 4 mm as the length. This is however the 

 only species which I have seen from South America with two tri- 

 angular black marks on the frons, and it agrees very well in other 

 respects with the description of frontalis. An examination of the 

 t^^pe of frontalis will determine if my identification is correct. 



MINETTIA CHILENSIS (Schiner) 



A shining fulvous yellow species, with apices of palpi black, and 

 tarsi infuscated apically. Wings yellowish hyaline. 



Arista pubescent; all frontal bristles, including the ocellars, long, 

 and strong; postverticals below the rounded edge of the vertex; 

 lower occiput with regular setulae and the usual two strong bristles 

 on lower margin. Intradorsocentral setulae in six series; thoracic 

 dorsocentrals as in triseriata. Fore femur without anteroventral 

 comb; mid tibiae without posterior median bristles. 



Length, 5 mm. 



Angol, Chile, January, February, and March, 1925. 



