Eumerus. 533 



vein curved a little down over the first posterior cell, or nearly straight; 

 sometimes (in non-Danish species) more deeply dipped; medial cross- 

 vein more or less oblique, placed at or beiiind the middle of the 

 discai cell; the upper marginal cross-vein curiously angulated, the 

 lower marginal cross-vein bent about rectangularly upvvards; the basal 

 part of the radial vein with very fine bristles. No stigniatical cross- 

 vein. Vena spuria stretching only to the cross-vein or slightly beyond. 

 Thoracai squamula with long, branched hairs, branched especially 

 below near the base ; alar squamula with shorter, simple, not flattoned 

 hairs. Plumula quite short, with short, simple hairs. 



The metamorphosis of E. strigatus is known; the larva {aeneus) 

 is mentioned by Curtis (Gård. Ghronicle II, 1842). Leon Dufour bred 

 the same species {aeneus) from an onion, which became rotten (Soc. 

 Se. Lille, 1845, 197, PI. I, fig. 1—4). Bouché (Stett. ent. Zeitg. VIII, 

 1847, 145) describes larvæ and pupæ of it {aeneus); the larvæ live in 

 the bulbs of AUium Cepa in July, and they may sometimes do great 

 damage, destroying the whole crop; they pupate in the bulbs oi- in 

 the earth, sometimes also under bark of decaying trees in the vicinity; 

 the pupal stage lasts three to four weeks; the author says that some- 

 times the pupa hibernates; he adds that the larva of what he calls 

 var. strigatus is somevvhat differing and lives above the ground in the 

 flower stalks, at the base of which it pupates. Scholtz mentions (Ent. 

 Zeitschr. Breslau, 1—3, 1847 — 49, 18) that according to Boie the laiva 

 {aenus) lives in bulbs of Narcissus. Herold notes (Zeitschr. f. wiss. 

 Insektenbiol. XI, 1915, 345) that he found the larva {lumdatus) in 

 potatoes, which were greatly injured by the attack; in each potato 

 were several larvæ; they were found on ^'^h and they pupated soon 

 after, partly in the potatoes, partly in the earth, and developed in the 

 beginning of the next month. 



According to Bouché the larva is dirty greyish yellow, spinulose, 

 wrinkled, and flat below; the anterior spiracles are brown; at the 

 posterior end is at each side a conical, wrinckled wart or filament and 

 below them a brown posterior spiracular process, which bears the 

 spiracles on the truncated end and is wrinkled in its basal part; the 

 length is fully 6 mm (Herold gives 8—11 mm). The pupa is similar 

 to the contracted larva but is darker; no anterior spiracular tubes 

 are mentioned. 



The affinities of the genus are not clear; the place of the medial 

 cross-vein and the thickened hind femora seem to indicate relationship 

 to Xylota and Si/ritta; on the other hånd it also shows many charac- 

 ters pointing towards the Pipiza-gvoup, especially towards Faragus, 

 thus the shape of vertex and epistoma, the shape of abdomen with 



