FORMOSAN AGROiAIYZIDAE. 307 



bristled as in Bhicnoesud. but tlic (lorso-centmls arc stronger Hum is the 

 rule in that ifenus. Lejjjs foniicd as in Ulncnoessa,\m{ hoth tlie mid and hind 

 tibise have well developed bristles on the dorsal surfaces ; no preapical 

 bristle present. Wing with costal vein reaching only to third vein, the 

 setula? minute, very slightly increasing towards end of first vein; at the 

 apex of the first costal division, there is a distinct small bristle, and a very 

 indistinct break; anal cell distinct; anal vein subobsolete; out<-r cro<s vein 

 at before w^ing middle. Scjuamee very small. 



This genus presents, in the bristling of the tibite, a charactei" which 

 I have not observed in BhicnoeHmi or its allies, but the type species is so 

 closely allied in other respects w'ith this genus, that I have considered it 

 advisable to associate it with BJikmoessa in my desci'iption. 



Pseudorhicnoessa spinipes n. sp. 



Female: Head yellow; ocellar triangle, black, the surface obscured 

 by gray pollen; back of head black, obscured with gray pollen; antennae 

 yellow, third joint lirownish ; arista brown; face and cheeks with whitish 

 reflection. Thorax black-gray, opacpie. covered witli gray pollinosity ; 

 pleuraj with a brownish tinge, opaque. Abdomen slightly shining, black- 

 brow^n, sides of the twx) basal segments yellowish, and a narrow, whitish 

 yellow, hind marginal fascia on each segment, which is slightly interrupted 

 on segments o to 5. Legs yellow, including the coxie ; all femora broadly 

 browned on apices; tibiae with apices browned; tarsi with tjie last two 

 joints brownish. Wings clear; eosta, first, third, and fifth veins [)rown, 

 second and fouith veins indistinct, the latter especially so on its whole 

 length. Squama" and halteres yellow. Hairs and bristles black. 



Ocellar bristles strong, divergent, widely se])arated at their bases; 

 surface of frons with scattered short hairs: antenna" of moderate size, 

 third joint rounded ; arista thin, short, not longer than width of frons at 

 anterior margin; head higher than long; clu^ek l)ai"ely one-third as high 

 as eye, marginal bristles in a single low, the bristles, increasing in length 

 towards anterior angle, upcurved ; vibrissa hardly stronger than last mar- 

 ginal bristle ; proboscis fleshy, stout ; palpi rather small. Mesonotum wdth 

 4 pairs of dorso-centrals ; the disc with very numerous short setulfe, of 

 which there are (i rows between the dorso-centials ; disc of scutelhnn witli 

 similar setulse. Alxlomen with numerous surface hairs, those on tht^ pos- 

 terior and lateral margins of the segments bristle-like. Legs short-haired; 

 mid tiliiifi with 2 antero-dorsal bristles, and 8 very high-placed on the 

 postero-dorsal surface, giving them the appearance of being almost on the 

 dorsal surface; hind tibige wdth 8—4 antero-dorsal bristles, and "2 on the 



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