Vol. IX] MALLOCH— FLIES (DIPTERA) FROM CALIFORNIA 301 



4. Limnophora magnipunctata, new species 



Male. — Deep black, shining. Orbits and parafacials with 

 white tomentum; thorax black, with slight grayish pruines- 

 cence, most distinct on lateral margins anteriorly and on 

 pleurse; abdomen with the usual paired black dorsal spots very 

 large, similar to those of L. nobilis Stein, but separated by a 

 pale line in centre ; legs black ; wings infuscated, most notice- 

 ably so basally, veins black ; calyptrse and halteres yellow. 



Eyes separated by a little less than width across posterior 

 ocelli; orbits linear above, with numerous long bristles and 

 hairs extending to anterior ocellus ; parafacial almost as broad 

 at base of antennae as the rather narrow third antennal joint, 

 not narrowed below ; cheek about three times as high as width 

 of parafacial, with several series of bristles along lower 

 margin, the upper two or three series upwardly curved, those 

 near anterior margin strong, vibrissal angle slightly produced ; 

 arista rather densely pubescent, the longest hairs a little longer 

 than its basal diameter. Thorax with the presutural acros- 

 tichals rather long, fine, four-rowed ; postsutural dorso-cen- 

 trals three ; anterior sternopleural short, lower posterior one 

 very weak. Abdomen narrowly ovate, fourth tergite a little 

 longer than third ; hypopygium small ; fifth sternite with a 

 rather deep, basally truncate posterior excision, the angularly 

 produced lateral extremities with a few bristly hairs. Fore 

 tibia without a median bristle, the apex with a long dorsal 

 and a short posterior bristle ; mid-femur with bristles on both 

 antero- and postero-ventral surfaces, the former very short, 

 the latter long basally; mid-tibia with three or four posterior 

 bristles ; hind femur with long bristles on apical half of antero- 

 ventral surface and a few on basal half of posterior; hind 

 tibia with two antero-dorsal and one or two antero-ventral 

 bristles, and one or two postero-dorsal setulae; hind tarsus 

 longer than tibia. Costal thorn very short. 



Female. — Difi^ers from the male in having the thorax with 

 a distinct dorso-central vitta, and a less distinct lateral vitta 

 on each side, the abdominal spots less distinct and more widely 

 separated, and the wings almost clear. 



Eyes at vertex separated by about one-fourth of the head- 

 width, wider anteriorly; each orbit with six or seven bristles 



