122 PROCEEDINGS OF THE NATIONAL MUSEUM vol. 115 



Female: Unknown. 



This species keys to P. choreus (Meigen) in Johannsen (1952). 

 There is much confusion as to the identity of P. choreus and P. culici- 

 formis (Linnaeus). Edwards (1929) Hsts them as separate species 

 although he points out there may be only a varietal difference between 

 the two. Edwards says the male genitalia of the two species are 

 identical. 



Through the kindness of Dr. Paul Freeman of the British Museum 

 (Natural History) I have examined examples of P. culiciformis and P. 

 choreus determined by Edwards. While there is a slight color and 

 size difference, the genitalia of the two appear to be identical. I must 

 therefore conclude that P. choreus is only a variety of P. culiciformis 

 and herewith list it as a new synonomy. P. culiciformis is redescribed 

 from Edwards' material in the appendix to this paper. 



P. barbatulus, new species, may be separated from the rest of the 

 Nearctic species by the distinctive dististyle of the male genitalia. 

 The genitalia resembles those figured by Freeman (1955) for P. 

 albitalus Kieffer and P. polytomus (Kieft'er). These species, however, 

 have distinctively different wing patterns (cf. Freeman, 1955, pi. 1, 

 figs, h and j). P. sagittalis (Kieffer) is described by Edwards (1929) 

 as having a dististyle that resembles P. barbatulus, new species ; how- 

 ever, P. sagittalis lacks a fore tarsal beard and can thus be distinguished. 



Procladius freemani, new species 



Figures 6a-e 



Holotype male: USNM 65520, San Bruno, San Mateo Co., Aug. 23, 

 1957, R. P. Maynard. 



Postocular bristles in 2 staggered rows; reaching medially to dorsal 

 extension of eye. Clypeal bristles 23. Palpi ratio 15:20:39:40. 

 Antennal ratio 2.22. 



Head and thorax almost entirely black, heavily dusted with white 

 poUen; heavily infuscate yellow on shoulders, pleura and apex and 

 lateral margin of prothorax. Prothorax with 13-17 lateral bristles. 

 Haltere knob white, stalk infuscate. Supra-alar bristles 2, 1 large, 

 1 small; prealar bristles about 19; dorsomedial bristle row divides just 

 behind inconspicuous mesonotal tubercle and extends laterally as 

 two rows, 1 on each side, almost to dorsolateral bristle row. Dorso- 

 lateral bristles in single row; immediately anterior to scutellum is a 

 transverse row of 5 bristles on each side, lying at right angles to dor- 

 solateral row. Scutellar bristles about 40; anterolateral bristles 6. 



Wings with preapical shadow as well as one in posterior margin. 

 Wing length 2.59 mm. 



Legs infuscate yellow, apex of tibia and basitarsus black; tarsal 

 segments 2 to 5 largely black; longest hairs of fore leg 3 times diameter 



