Art. 9 



NEW SPECIES OF TWO-WINGED FLIES — ^ALDEICH 



RHYSOGASTER, new genus 



In subfamily Panopinae. Eyes densely hairy, contiguous above 

 antennae for two-thirds the height of the head, ocellar tubercle 

 minute, the ocelli vestigial. Antennae inserted only a little above 

 mouth, first two joints distinct, third missing. Eyes not approxi- 

 mated below antennae. Proboscis rudimentary but projecting below 

 the head about one-third head height, without labella, but with dis- 

 tinct two-jointed palpi. Thorax moderately inflated, humeri large 

 but widely separated, mesopleura 

 protuberant above, hind part of 

 pteropleura (before spiracle) pro- 

 jecting in globose form; calypters 

 hairy above. 



Abdomen folded beneath (in fe- 

 male) the terminal segments ad- 

 herent to the middle portion so 

 that the genitalia are only a little 

 beyond the hind coxae, as figured. 

 The sternites are greatly nar- 

 rowed, but six can be easily 

 counted before the genitali, in the 

 form of wrinkles. The abdominal 

 spiracles are large and ring-like, 

 a row of five extending backward 

 and two more conforming to the 



folding of the segments, lying mesially from the hinder part of 

 the row. The venter is shown in Figure 1, drawn by R. E. Snod- 

 grass. 



Venation almost as in Eulonchus, but even more as figured by 

 Westwood for Apsona Tnuscmia. Pulvilli and empodium well de- 

 veloped as usual. 



Type of genus. — Rhysogaster im/plicata^ new species. 



Fig. 1. — Rhtsogastbb Implicata, new 

 Species. Abdomen, Venteal View. 

 T. Tebgitb. S. Sternitb 



RHYSOGASTER IMPLICATA, new species 



Female. — ^Head black about mouth; palpi and apical half of pro- 

 boscis black, base of latter yellow. Thorax brownish-black with yel- 

 low tinge about the sutures, covered with dense yellow hair except 

 just above middle and hind legs. Abdomen yellow with six black 

 crossbands which do not reach the margins of the tergites in any 

 direction except the last two, which reach the sides; there is also 

 a narrow black margin embracing the genitalia, which are large 

 and show three pairs of soft hairy, palpus-like organs behind the 

 opening. 



Legs yellow, tibiae tinged with black and tarsi entirely black. 



