from the Philippine Islands. 243 



Geomyzidae. 



Diplocentra. 



Loew, Centur. II, 288; Ciirtonotma Macq. D. E. II, 3, 193; Schiner, 

 Faima Austr. II, 22. 



The species before me agrees in the principal characters with 

 Macquart's description ; but the third antennal joint is rather short, 

 elhptieal (and not four times as long as the second); the scutellnm has 

 only four (and not six) long and strong bristles'); there are several 

 praescutellar macrochaetae, (while Macqaart's species' is said to have 

 no macrochetae on the thoracic dorsum). The chaetotaxy, as far as 

 I can discern in my only specimen is as follows : 



Head. Vertical bristles, inner pair longer and stronger than the 

 outer; postvertical pair comparatively long; ocellar of moderate length; 

 fronto-orbital, two, the upper one long, the lower one shorter and 

 weaker; a small genal bristle; a weak vibrissa; the upper occipital 

 orbit with a row of shorter bristles (cilia). 



Thorax. Humeral bristle, one, very long; posthumeral, two; 

 praesutural, one. Supra-alar, three (?) Praescutellar two pairs, the outer 

 one much longer than the inner; a shorter pair, more in front, corres- 

 ponds in width to the outer pair. No other macrochaetae in the 

 dorsal region, but it is closely covered with short, semi-appressed bristles. 



Pleurae. Mesopleural bristles two, near the mesopleural suture; 

 a third, weaker one between them; a fourth, lower down, above the 

 sterno-pleural suture. Sterno-pleural one, longer than the mesopleural 

 bristles, inserted above the middle coxae. 



Legs. Two small bristles on each of the front and middle coxae; 

 and one (?) on the hind coxae. Four bristles on the hind side of the 

 front femora; two long apical bristles on the middle femora (also men- 

 tioned in Macquart), and several smaller bristles on the front side; one 

 praeapical bristle on the front side of the hind femora. Front and 

 hind tibiae with one praeapical bristle; middle tibiae with four or five 

 long apical and praeapical bristles. 



') The statement that there are six scutellar bristles, and no 

 macrochaetae on the thoracic dorsum, was a mistake of Macquart's^ 

 and not a peculiarity of C. gihhimi. Rondani, Esame etc. p. 18, has 

 corrected it. But Rondani is wrong immediately afterwards, in iden- 

 tifying the Helomyza circumfusa Wied. (Sumatra), with a brazilian 

 species. 



