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DESCRIPTION OF AGROMYZA PHASEOLI, A NEW 

 SPECIES OF LEAF-MINING FLY. 



By D. W. Coquillett. 



(Communicated, with a Note thereon, hy W. W. Froggatt, F.L.S.) 



Agromyza phaseoli, n.sp. 



Black, including the halteres. Front on the sides opaque, the 

 triangle highly polished, almost reaching the lower end of the 

 front. Body strongly tinged with blue, polished, not light 

 coloured pruinose on any of its parts; thorax bearing two pairs 

 of dorso-central macrochaette, destitute of acrostichals. Wings 

 hyaline, costa strongly thickened beyond the apex of the first 

 vein, small crossvein distinctly beyond the middle of the discal 

 cell, hind crossvein at three-fourths of its length beyond the small, 

 apex of third vein midway between the apices of the second and 

 fourth veins. None of the tibiae nor of the tarsal joints notice- 

 ably dilated or swollen. Length, 1 -5 mm. 



Hah. — Gosford District; N.S.W.; described from five specimens 

 received from W. W. Froggatt, Sydney, Australia, under the 

 name of French bean fly pest. 



Among an exchange collection of economic entomological 

 specimens sent to Dr. Howard, Chief of the Entomological Divi- 

 sion of the Department of Agriculture, Washington, U.S.A., I 

 forwarded some specimens of an undetermined leaf-mining 

 dipteron, which last year proved a most destructive pest to 

 people growing French beans in the Gosford district, N.S.W. 



In company with the Secretary of the Agricultui'al and Horti- 

 cultural Association of Gosford, I visited the infested gardens 

 early in April. Four or five gardens about Erina and Wamberal 

 were so badly attacked that all the plants were destroyed before 



