11. CHORISOPS 215 



above the antennae, where it is about half as wide as at the vertex ; the 



vertex bears some moderately long black hairs, but the f rons has only a short 



pale pubescence ; face not at all produced, glistening white, slightly widening 



down to the mouth, and bearing pale hairs on the sides but with a few blackish 



or even whitish hairs down the middle line and especially on the lower part ; 



jowls very small, but their back part and the lower part of the back of the 



head with some slight pale pubescence ; back of the 



head deep black but very shallow and with a very 



short black postocular ciliation on the upper part ; 



ocellar space elevated, and the three ocelli dull 



reddish and equidistant. Proboscis dull orange ; 



palpi small, dull yellowish, distinctly porrected well 



above the proboscis. Eyes bare, and in life dark 



green ; facets all equal. Antennae long and rather 



thin, being slightly longer than the head and thickest 



on the second and base of the third joints, usually 



dull brownish black but brownish orange beneath 



the second and the base of the third joints, and ^^^^ ^^^ ^chorisops 



sometimes dull brownish orange with only_ the tip wkaii^ <j . x is. 



half of the third joint blackish, or sometimes all 



dull blackish ; basal joint thin and distinctly longer than the second, and 



both bearing minute black bristles; third joint nearly twice as long as the 



two basal joints together, and rather indistinctly 8-annulated with the hrst 



and last annulations not conspicuously longer than the others 



Thorax and scutellum brdliant shining green, finely and rather sparsely 

 punctate, and bearing a not scarce though not conspicuous fine pale yellow 

 pubescence all over : pleurae with the middle part of the mesopleuraj bare, but 

 the hind part with rather longer and more conspicuous pale pubescence. 

 Scutellum with four yellowish marginal spines which bear (besides other hairs) 

 a rather long apical hair which is easily broken ofl'. 



Abdomen black, moderately shining, with more or less yellow coloring on 

 the disc ; sometimes the yellow colour is limited to the middle of the base ot 

 the third and fourth segments, but more commonly nearly all the disc of the 

 third and fourth segments and the base of the fifth are yellowish, and some- 

 times the yellow colour extends over almost all the second to fifth segments 

 and on to part of the sixth. Belly as a rule more extensively yellowish than 

 the dorsum. Pubescence mainly very short and dark colored, but long pale 

 yellow and fairly abundant down the sides from the base to part way down 

 the fourth segment. Genitalia distinct, being much narrower than the last 

 abdominal segment and only connected with it by a sort of neck ; genital 

 lamellge orange. . • j i 



Legs mainly yellow or dull orange, or sometimes more obscure m dark 

 specimens ; tarsi blackish from the tip of the basal joint onwards, and some- 

 times the front tarsi blackish even to the base ; hind femora brownish yellow 

 or even brown about the middle and just before the tip, shghtly mcrassated; 

 hind tibiie blackish brown after the basal quarter, and considerably mcrassated 

 after the base ; hind tarsi rather short, basal joint moderately mcrassated and 

 quite as long as the other four joints together. Pubescence very slight and 

 pale yellow on the femora, and even the minute pubescence on the legs pale 

 except on the dark parts of the tarsi and on the incrassated part of the hmd 



Wings faintly suffused with brown, and with a conspicuous large dark 

 brown stigma. Alar squamae moderate in size, dull glassy with pale fringes ; 

 thoracal sciuamaj almost absent. Halteres yellow, knob large. 



? Very similar to the male, but the disc of the abdomen usually more yellowish 

 and the dark parts of the legs lighter colored. Frons nearly one-fifth the 

 width of the head and more equal in width from the vertex to the antennae, 

 shining greenish black down to the white space above the antennae, and 

 bearing such very short pubescence that it appears to be bare ; back ot the 

 head slightly but equally puffed out ; pubescence on the face very slight, but 

 that on the lower part of the back of the head obvious. Antennaj longer than 

 in the male. 



