16 PROCEEDINGS OF THE NATIONAL MUSEUM vol.69 



stemopleiirals 2, 1. Wing with an oblique bend in the fourth vein, 

 whicii ends moderately far before the apex; the auxiliary and first 

 longitudinal veins end rather close together in the costa. Veins bare 

 except the base of third. 



Type of genus. — Meledonus laiipennis, new species. 



MELEDONUS LATIPENNIS, new species 



Male, — Front 0.35 of head width, entirely black, the median stripe 

 four times as wide as one orbit when measured just in front of the 

 ocellar triangle. Parafrontals widening downward, with gray pollen 

 which continues on the parafacials and around the bucca. Antennae 

 black, third joint only a little longer than second; the arista strik- 

 ingly short, l)asal joints short; vibrissae not much above the oral mar- 

 gin, the angles not convergent; back of head with entirely black 

 hair. 



Thorax with thin grayish pollen, subshining in the middle; scutel- 

 lum of same color; calypters white. 



Abdomen rather elongated, the first three segments with uniform 

 whitish pollen except on apical edge, which shows best when viewed 

 from behind; fourth segment entirely shining black; the first and 

 second segments each have a pair of median marginals, the third 

 segment with a row of about 14; the last segment has only a mar- 

 ginal row of about the same number. Legs entirely black, pulvilli 

 distinctly elongated, middle tibia with two bristles on outer front 

 side. 



Wings uniformly infuscated with the veins yellow, at base becom- 

 ing brown. Base of third vein with about four large erect hairs 

 rather far apart. 



Female. — Front 0.40 of the head width (average of three, 0.37, 

 0.41, 0.42). 



Wings considerably broader than in the male. 



Length, 5.5 to 6.3 mm. 



Described from one male and three females; two females are from 



southern Sonoma County, California, July 1, 1910, and May 23, 1911, 



collected by J. A. Kusche; the male was collected at San Francisco, 



California, June 11, 1910, by the same collector. Another female 



was collected at Stone Canyon, Monterey County, April 27, 1919, by 



E. P. Van Duzee. 



Type male and allotype female (from Sonoma County) are in the 



collection of the California Academy of Sciences. 



Paratypes.— Two females. Cat. No. 28901, U.S.N.M. 



