Sept.,i902.] Coquillett: New Orthorrhaphous DiPTERA. 137 



soon be sent out it is deemed desirable to publish the descriptions at 

 as early a day as possible. The present paper deals with the new 

 forms belonging to the section Orthorhapha. 



Family Culicid.^. 

 Culex cyanescens, sp. nov. 



Black, the stems of the balteres and the femora except their apices, yellow ; 

 occiput rather densely covered with broad, appressed, yellow scales and narrow, 

 upright, yellow ones changing to black at the sides and posterior edge, a spot of violet 

 blue appressed scales near middle of each outer edge of the occiput ; palpi covered 

 with broad, appressed, violet blue scales ; mesonotum and scutellum rather densely 

 covered with broad, appressed, brassy yellow scales, the pleura with whitish ones ; 

 abdomen densely covered with deep blue scales, the posterior angles of each segment, 

 whole of the first and of the venter covered with brassy yellow scales, the spots at the 

 posterior angles of the segments considerably produced forward at their inner ends ; 

 scales at apices of femora, on hind tibiae and front side of the others, also on tarsi, 

 violet blue ; tarsal claws large, one-toothed ; wings grayish hyaline, veins chiefly blue, 

 lateral scales narrow and elongate, petiole of first submarginal cell four-fifths as long 

 as the cell, posterior cross-vein about its own length from the small ; length, 4 to5.5 

 mm. 



Habitat : Brownsville, Texas. 



Type : Cat. No. 6308, U. S. N. M. 



Six females collected in May and on June 4. 



Family Psychodid.^. 



Trichomyia cirrata, sp. nov. 



Brown, the ant'ennaa, pleura and legs except the tarsi yellow ; antennae nearly 

 as long as the body, the joints beyond the second over three times as long as wide ; 

 occiput, body and legs rather densely covered with appressed yellow scales, sides of 

 mesonotum densely long yellow pilose, nearly extending to the middle of the anterior 

 end, several rather long yellow hairs near apex of abdomen ; wings narrow and 

 pointed, sublanceolate, covered with pale yellow and dark gray hairs, fringe on the 

 posterior margin almost half as long as greatest width of wing, petiole of first sub- 

 marginal cell less than half as long as that cell, petiole of the second posterior cell 

 less than one fourth the length of the cell ; length, i mm. 



Habitat : Frontera, Tabasco, Mexico. 



Type : Cat. No. 6309, U. S. N. M. 



Four female specimens collected March 26. 



Family Tabanid/E. 

 Pangonia seminuda, sp. nov. 



Black, the antennas and palpi reddish-yellow, balteres and knees dull yellow, 

 abdomen varying from reddish-yellow to black ; head yellowish-gray pruinose, ocelli 

 present, third antennal joint near base much wider than the second, the apical annulus 



