753. 

 SYRPHUS LUCORUM. 



Order Diptera. Fam. Syrphida?. 



Ty])e of the Genus, IVIusca Lucorum Linn. 



Syrpiius Fab., Meig., Macq., Curt. — EristaKs Fa6., Lat. — Cheilosia 

 Macq. — Musca Linn., Fab. 



Antenna inserted on a slight prominence in front of the fore- 

 head, small, porrected, approximating at the base, 5-jointed, 

 basal joint elongated, pyriform-truncate, very bristly as well as 

 the 2nd, which is shorter and stouter, narrowest at the base, 

 3rd large, velvety, ovate, compressed, 4th a minute joint inserted 

 near the base on the back of the 3rd; 5th a moderately stout 

 and very pubescent seta, naked at the apex (3). 

 Labrum long, stout, hollow, the apex bilobed with a spine in 

 the centre (lb). 



Tongue shorter, attenuated and acute (c). 

 Maxillce nearly as long as the tongue, slender and curved (e). 

 Palpi as long as the labrum, slender, nearly linear, pubescent, 

 slightly pilose, the apex rounded (/). 



Lip rather long when extended, large bilobed and hairy ((/). 

 Trophi received into a large oval cavity. Head rather large, trigonate, 

 a little broader than the thorax ; face concave, the apex a little 

 elongated, with a smooth tubercle on the nasus, which is notched (2 

 the jirofile) : eyes large, vertical, hairy, contiguous on the crown in 

 the males (2 ^), moderately remote in the females : ocelli 3 in tri- 

 angle near the base. Thorax ovate-truncate : scutel semiorbicular. 

 Abdomen broader than the thorax, slightly convex, elongate-ovate. 

 Wings incumbent and parallel, with 2 transverse nervures on the 

 disc, and 2 parallel to the margin, one being waved, 2nd longitudinal 

 nervure slightly undulating : halteres small, capitate. Legs slender, 

 hinder the longest (Sf) : thighs, anterior a little thickened at the 

 base : tibiae slightly tvaved: tarsi 5-jointed, hinder attenuated, basal 

 joint the longest, 4th the shortest, sublunate in the anterior, 5th 

 short obovate : claws strong : pulvilli bilobed. 



Lucorum Linn. — Curt. Guide, Gen. 1239. 23. 



Face whitish- ochre, crown with orange hairs, a stripe on the 

 clypeus piceous ; beneath bluish-brown : antennae black : thorax 

 dull olive -green with paler stripes, densely clothed with bright 

 orange pubescence, especially the basal portion : scutel ochre- 

 ous, with orange hairs : abdomen hairy, basal joint black, 2nd 

 bright ochreous with a short black line on the back, 3rd segment 

 chalybeous, the hairs black ; the remainder chalybeous or green- 

 ish, with ochreous hairs : wings with a large brown patch on 

 the disc, extending from the brown stigma to the centre : hal- 

 teres brown : legs black, apex of thighs and basal half of tibiae 

 pale ochreous. 



