176 PROCEEDINGS OF THE ACADEMY OF [1898. 



coating. The anterior femora are of the same colors as the thorax, 

 the middle and posterior femora are dark brown, with here and 

 there suggestions of the green color and hoary coating. The tibiae 

 and tarsi are a very dark brown. Tegulse milky white. Halteres 

 brownish. The gense, geno-vertical plates, ocellar triangle, poste- 

 rior orbits, buecse and vibrissal ridges are dirty white with the usual 

 silky lustre, varying according to the incidence of the light to a pale 

 brown. Frontal vitta pale brown. Antennse: second joint pale 

 brown, third joint darker brown with hoary coating. 



Bristles of Head. — Inner vertical, outer vertical, greater ocellar, 

 and cilise of posterior orbit as in P. rudis. Lesser ocellar less 

 numerous than in rudis, only three or two pairs. Ascending frontal, 

 one, large. Transfrontal six to eight, mostly decussate over the nar- 

 row vitta. Orbital : a row of four to six large bristles, the inser- 

 tions of which are roughly parallel to the insertions of the trans- 

 frontals ; a second row laterad the large ones and parallel to them 

 composed of very small bristles. Gense bare. Buccse with a series 

 of stout bristles along the edge of the mouth opening and with the 

 remainder of their surface sparsely beset with very fine hairs. Vi- 

 brissal ridges with a very few hairs dorsad the principal vibrissa 

 extending; little or not at all dorsad the ventral end of the arm of 

 the frontal suture. 



Bristles of Thorax, I, 5a, 5b, 5c. Humeral, 3. Post-humeral, 2. 

 Dorso central, 6, two in front of and four behind the suture. 

 Acrostichals very small, one anterior and two posterior to the 

 suture. Intra-alar, 4, one in front of and three behind the suture ; 

 the most posterior is very small and a little mesad the line of the 

 others. Supra-alar, 3, of which, as usual, the middle one is much 

 the largest. Post-alar, 2, as usual. Notopleural, 2, as usual. 



Scutellar. — A small bristle of the jugum, an apical, two marginal 

 and a rather small discal. 



Bristles of Abdomen. — As usual in Muscidre (sens, strict.). 



The macrochaetse of the head and thorax and nearly all the minute 

 bristles and hairs of the thorax and abdomen appear to be inserted 

 at the centres of little black disc-shaped spots. 



Bristles of the Legs. — Too imperfect to be described. The only 

 especially noteworthy feature that can be made out is a long, stout 

 bristle at the middle of the anterior surface of the middle femur. 

 This represents, apparently, the anterior median row of bristles of 

 the middle femur that is so universally present in the Muscidse (sens. 

 strict.) aud is so well developed in P. rudis. 



