Vol. VIII] ALDIUCH— KELP-FLIES OF NORTH AMERICA 171 



7. Fucellia rejecta, new species 



Female: Black in ground color, but with legs, wing veins, and most of 

 tlic head yellow. Front almost half as wide as head, decidedly prominent 

 ahove antenn.T, bristles as in inaritiiiia : parafrontals brown above, yellow 

 below their middle; frontal stripe reddish, with an interrupted blackish 

 crescent anteriorly, beyond which it is yellow to the antennae; parafacials 

 and bucca yellow, with yellowish pollen, the former wider than usual, the 

 latter almost as wide as eye-height; eye almost perfectly round; antennre 

 dark yellow, third joint except the base dark brown, arista brown, thick- 

 ened almost halfway, pale in middle ; palpi yellow, proboscis black ; back 

 of head black in ground color above, yellow below, bulging, with few hairs, 

 those of metacephalon long. 



Thorax with same chretotaxy as maritima, but the post dc might be 

 counted as four, since the coarse hair behind the third is here fully half 

 as long as the latter; between and above the front cox?e is a keystone- 

 shaped sclerite with a notch above, into which fits a rather striking, small 

 shining red sclerite; calypters white, rim and fringe concolorous ; haltcres 

 3'ellow. 



Abdomen slightly tessellated, with an indefinite median dark stripe which 

 disappears at some angles of view ; fourth segment yellow on apical third. 



Legs yellow, including tarsi as much as halfway, but the latter are dark- 

 ened by the usual small hairs; front and hind femora slightly infnscated at 

 base; front coxae yellowish, the others black in ground color; front tibia 

 with one strong seta on front and one on outer hind side ; middle tibia 

 vyith one (large) on outer front, 3 irregularly placed on outer hind; hind 

 tibia with three on hind (the third nearly one-third as long as the tibia), 

 four on outer hind, and two on outer front; middle femur with four 

 scattered bristles on lower hind edge; hind femur with a row above and 

 6 or 7 below on outer side. 



Wings hyaline, veins yellow, third more brown ; costal spines small, the 

 usual setulcs of the genus almost imperceptible. 



Length 7 mm. 



One female, Ocean Beach, a submb of San Diego, Cal., Jinie 

 28, 1917. Type in U. S. National Museum. 



I do not hesitate to describe this well-marked species from a 

 single specimen, as it is not rare where the type was obtained. 

 I saw se\-eral specimens, distinguishing them readily at several 

 feet by their pale color ; but on account of their activity and 

 wildness. I succeeded in capturing but one in the time at mv 

 disposal. It is not unlilcely that the males have somewhat 

 darker femora, judging from th.e slight infuscation at the base 

 of the front and hind femora in the type. 



The nearest ally of rejecta is perhaps fnuifera Stein (W. E. 

 Z., xxix. 22) of Chile and Peru; it has yellow legs, but the 

 parafacials are hairy, and the scutcllum has hairs on the rlisk 

 and lacks the usual pair of discals. Fimifera is the only species 

 of the genus known from the west American coast south of San 

 Diego. 



