8. CHLOROMYIA 189 



all over, and appearing conspicuous Avlien viewed sideways ; sloping but 

 hardly adpressed unless on the middle of the disc. Belly black, and bearing 

 obvious though not at all dense decumbent orange pubescence. Genitalia 

 blackish, conspicuous tliough small, exserted from about the middle third of 

 the sixth abdominal seginent and ending in a pair of small lamellae. 



Legs dull brownish black, with nearly the apical fourth of the femora and 

 the basal third of the tibise reddish orange. Pubescence slight and all pale 

 yellow except for the longer black hairs at the end of the tarsi near the claws. 

 Pulvilli dull orange ; claws black, but orange at the base. 



Wings greyish hyaline but strongly tinged with brownish orange ; stigma 

 indistinct, but the discal cross-vein and the cross-veins ending the discal 

 cell slightly darkened ; extreme base of the wing blackened. Alar squamiB 

 inconspicuous, obscure glassy brown with very short whitisli marginal fringes ; 

 thoracal squamsB broAvnish, forming an almost circular disc, and with long 

 brownish -yellow pubescence all over. Halteres reddish orange, but the stem 

 sometimes pale yellow. 



9 . Eather broader, barer, and greener than the male. Frons shining black and 

 occupying fully one- third the width of the head, very finely and rather sparsely 

 punctate • the triangular depression which contains the equidistant ocelli is 

 continued as a narrow channel down the frons to another triangular depression 

 just above the antennae ; sides of the frons almost parallel down to the antennae, 

 and all the frons with inconspicuous but not scarce rather short pale greyish 

 pubescence. Face rather short, but continued by moderately broad eye- 

 margins under the eyes round to the jowls and back of the head, and on these 

 lower sidemargins of the face there is a longer pale pubescence which con- 

 trasts with the rather shorter and mainly black pubescence on the somewhat 

 bulging disc of the face ; jowls small and bearing similar pale pubescence to 

 that on the sides of the mouth ; back of the head shining black and almost 

 impunctate, broad all the way up and decidedly broad above the middle until 

 it is (at the top corners of the eyes) nearly a quarter the length of the head, 

 and with short pale pubescence behind the polished part. Eyes with slightly 

 shorter pubescence than in the male ; in life brownish purple on the upper 

 third and dull coppery green on the lower part with a peacock-hued (dark 

 blue, light blue, and green) intermediate band, which becomes widened and 

 less defined towards the back of the eye. Antennte as in the male, or with 

 the third joint more dull blackish. 



Thorax with the pubescence all pale and all short, but less dense and 

 consequently leaving the thorax rather more brilliant ; the bare part of the 

 mesopleurae is more distinct. 



Abdomen broader and shorter than in the male, being only about one and 

 a quarter times longer than broad, brilliant purplish on the disc but green at 

 the sides, densely punctate, and bearing a minute inconspicuous pubescence. 

 Ovipositor ending in a pair of small black lamellae almost as in the male. 



Legs very similar to those of the male. 



Wings perhaps slightly paler than in the male. Squamse and halteres as 

 in the male. 



Length about 9 mm. 



This species has no close ally in Britain as the densely hairy eyes 

 distinguish it at once from all our Sargincv, but there is a widely dis- 

 tributed continental species, C. speciosa Macq. (= melampogon Zell.) which 

 is very closely allied, but which has the pubescence black on the whole of 

 the face, and which also has the wings more blackish tinged and the 

 posterior tarsi yellowish. 



C.formosa is very common in Britain, and I have innumerable records 

 from Penzance to Golspie and the Orkneys, while I have records from 

 several Irish localities. My dates extend only from May 13 to July 31, 

 and it is mainly a June species. It is common in gardens where it 

 suns itself on the leaves of plants, and it has been bred from the common 



