INSECUTOR INSCITI^ MENSTRUUS 183 



NEW NORTH AMERICAN PHORID^ OF THE 

 GENUS APHIOCH^TA^ 



(Diptcra) 

 By CHARLES T. BRUES 



The species described in the present paper are in part from 

 the Northwest, collected by Professor A. L. Melander, and 

 from several localities in the Eastern States. I have also been 

 able to recognize with reasonable certainty several European 

 species not hitherto known to occur in North America and 

 notes on these have been included. 



Five of the species described as new have the anterior tarsi 

 strongly thickened and are on this account easily distinguished 

 from the bulk of the North American members of the genus. 

 Only two others of this group have hitherto been known from 

 this continent and one from the West Indies, although a con- 

 siderable series have been found in Europe. 



Aphiochaeta dilatata, new species. 



Male. Length 1.5 mm. Black, legs dark brown, somewhat 

 lighter on the tibiae and tarsi ; palpi pale brown ; halteres black ; 

 pleurae varied with dark brown ; wings faintly brownish, al- 

 most hyaline, heavy veins fuscous. Front one-fourth wider 

 than high, not shining and rather strongly hairy between the 

 large bristles, especially at the middle below ; four proclinate 

 bristles of about equal size, the upper ones but little above the 

 lower ones and twice as far apart, occupying nearly one-third 

 the \vidth of the front ; lower reclinate bristles set with the 

 inner one far from the eye and much below the outer one 

 which is next to the eye ; upper reclinate row distinctly curved 

 down medially, its four bristles equidistant with the lateral 

 ones very close to the eye ; ocellar tubercle well developed ; 

 median frontal groove not very well marked. Antennas notice- 

 ably enlarged, the diameter of the third joint equal to the great- 

 est width of the eye ; arista one-third longer than the height of 



' Contributions from the Entomological Laboratory of the Bussey Institution, 

 Harvard University, No. 148. 



