VIII. D, 4 Bezzi: Philippine Diptera, I 323 



The genera of true Dacinae known from the Oriental Region 

 can be distinguished as follows: 



Key to the genera of Dacinte of the Oriental Region. 



a\ Femora not spinose beneath; anterior scutellar and praescutellar bristles 

 present. 



6\ Wings banded Bactrocera G.-M. 



b'. Wings not banded Cheetodaous Bezzi. 



o'. Femora spinose, at least those of the first pair. 



c\ Anal cell drawn out in a long point; second basal cell dilated; arista 

 bare; abdomen club-shaped. 

 (T. The first 2 joints of the antennae united in a single joint, forming a 



unique peduncle Callantra Walk. 



d'. The first 2 joints of the antennae wholly separated. 



Monacrostichus gen. nov. 

 c'. Point of the anal cell very short; second basal cell not dilated; arista 

 short plumose; abdomen cylindrical; all the femora spinose. 



e'. Antennae much longer than the face Meracanthomyia Hendel. 



e'. Antennas shorter than the face Adrama Walk. 



Key to the presumptive species of Monacrostichus. 



a*. Wings cinereous, tawny along the costa and along the veins, blackish 

 toward the apex; face with a broad triangular black spot in the 

 middle; mesonotum tawny with a black dot on each side of the fore 

 border; length "8 lines;" (Waigoe.) (This species is perhaps a 



Xenaspis) sepedoaoides Walk. 



a.' Wings grayish hyaline, with a brown streak along the costal border; 

 length 8-9 mm. 

 6*. Dark costal margin of wings extending to the fourth vein; anal cell 

 with a brown streak; face vdth an elongated black mark on each 

 side; femora broadly blackish brown. (Gosford, N. S. W.). 



aequalis Coq. 



6\ Brown costal border not reaching the fourth vein ; anal streak wanting. 



c\ Face with a black oral border; brown border of wings passing the 



third vein; femora yellowish or blackish. 



(P. Palpi yellow; face with a black dot on each side; yellow spot on 



sternopleura small; femora yellowish (Java). 



longicornis Wied. {vespoides D.) 



cP. Palpi black; face broadly black below; spot on sternopleura 



broad; femora blackish, somewhat yellow at both ends (Java). 



conopsoides Meij. 

 c'. Face in the middle with a transverse black band united with the 

 black antennal cavities; this band is dilated below toward the 

 middle and prolonged to the mouth; dark yellowish costal area of 

 wings hardly passing the third vein ; femora yellow, with a broad 

 black streak below; palpi yellow citricola sp. nov, 



65. Monacrostichus citricola sp. nov. 



A very distinct waspish-looking fly, which seems to be allied 

 to longicornis, but is easily distinguished from that and its 

 allies by the peculiar color pattern of the face. Professor Baker 



119837 6 



