AKT. 9 TWO-WINGED FLIES OF TRIBE MILTOGRAMMINI ALLEN 57 



vein. From campestris it may be readily distinguished by the absence 

 of median marginal bristles on the first abdominal segment, the 

 absence of a distinct whorl of three bristles on the middle tibia beyond 

 the middle, in the comparatively weaker development of macro- 

 chaetae on the third abdominal segment laterad of the median mar- 

 ginal pair and in the presence of the perpendicular hind cross vein. 

 Male differs further in having no conspicuous long bristly hairs on 

 the side of the fore tarsus. 



METOPIA LATEROPILI, new species 



Male. — Front at narrowest 0.325 of the head width (measurements 

 of two 0.31 and 0.34, respectively) ; front and face silvery pollinose 

 with dark reflections toward vertex; inner orbits most nearly approxi- 

 mated at base of antennae, diverging slightly toward vertex, widely 

 towards bucca, with a concavity to accommodate the bulging para- 

 facials; frontal vitta black, pollinose anteriorly, diverging slightly to 

 middle, thence with parallel sides to vertex, width at lowest orbitals 

 one and one-half to two times that of either parafrontal; about ten 

 bristles in frontal row which closely borders the vitta, upper five or 

 six bristles much the smallest; front Vv^ith sparse black bristly hairs 

 outside the frontal rows; vibrissae at level of front edge of oral 

 margin; antennae black, extending to one-half length of its second 

 joint from vibrissae, third joint four to five times as long as the second; 

 arista tlxickened on basal two-fifths; parafacials bare save for row of 

 strong bristles near facial ridges extending downward to level of 

 uppermost bristles of the facial ridges; in profile, buccal width equals 

 parafacials at narrowest, and is approximately one-tenth the eye 

 height; front projects one-third the horizontal eye diameter; palpi 

 yellow, filiform, and distinctly more slender than the thickened part 

 of arista. Thorax thinly pollinose over shining black, notum bronzed 

 and obscurely marked with three narrow median and two broad 

 lateral vittae; scutellum uniformly bronze pollinose, with three pairs 

 of nearly equal marginal bristles, no distinct preapicals. Abdomen 

 black, without red or yellow spots on the sides, last three segments 

 with gray pollinose bands on the basal two-thirds which are divided 

 by an indistinct black vitta on the intermediate segments; second and 

 third segments each with a median marginal pair of bristles, fourth 

 segment with a marginal row of about eight. Genitalia small, black, 

 in repose not extruding from the tip of the abdomen. Wings sub- 

 hyaline; section of fourth vein beyond the bend slightly arcuate, 

 oblique to hind cross vein; last section of fifth vein nearly half as 

 long as preceding section; third vein bristly more than half way to 

 small cross vein. Legs black; fore tarsus with several long slender 

 erect hairs on the sides of the second, third, and fourth joints, fourth 

 joint not conspicuously reduced; middle tibia lacking bristles on 



