Schmidtia Helophilus

1.b. Arista yellow to red, head as figure Recognition 393; tergites: dull bands clearly separated from hind margin of tergites; thoracic Hammerschmidtia are large orange-brown dorsum black with grey dust, with lon- flies, which resemble Scatophagidae gitudinal black stripes. 10-12 mm. rather than Syrphidae. They might be Central Europe, in Asia east to confused with Brachyopa, but Northern China › Ferdinandea ruficor- Hammerschmidtia ferruginea is significantly nis Fabricius larger, with an elongate abdomen. 392. Key 1. Single European species. Large, elongate, orange-brown hoverfly; arista feathered. 10-12 mm › Hammerschmidtia ferruginea Fallén HELOPHILUS 393. Introduction Helophilus are large hoverflies that prefer moist and wet habitats. They visit flowers with shallow nectaries and bask on leaves in the sun. Most of them are good flyers and they may disperse across large distances. H. figure 392. Ferdinandea cuprea, head of male. affinis migrates a long way south and may figure 393. Ferdinandea ruficornis, head of occur as far south as The Netherlands. male (Verlinden). Their larvae are semi-aquatic filter feeders on detritus and bacteria. They are associ- ated with accumulations of decaying organic material in ponds and mud. Their last segment is elongated into a tail, like that of Eristalis (Rotheray, 1993). HAMMER - Recognition SCHMIDTIA Large, yellow and black hoverflies, with longitudinal whitish stripes on the black thoracic dorsum. Spots on tergite 4 often grey. Introduction The key is based on Van der Goot (1981), Verlinden (1991) and Nielsen (1997). Hammerschmidtia inhabit coniferous (Pinus) or deciduous (Betula, Quercus) for- est with old growth Populus tremula. The adults may be found sitting on the trunks of Betula and old P. tremula, or on logs and stumps in the vicinity of P. tremula. They visit the flowers of white umbellifers, Ranunculus, and male Salix (Speight, 2003). 119 Key 395. 1.a. Tergite 3 with yellow spots; tergite 2: yellow spots large, they cover most of the side margin › 2 1.b. Tergite 3: without yellow pattern, but black with small grey band, which may be interrupted in the middle, tergite 2 with narrow yellow spots, which cover less than half the side margin (figure 394). 10-12 mm. Northern Europe › Helophilus bottnicus Wahlberg 2.a. Thoracic dorsum without a band of black hairs between wings, predominant- ly with pale hairs; scutellum pale haired; tergites: hind margins black or yellow › 3 396. 2.b. Thoracic dorsum: a wide band of black hairs between the wings and pale hairs on other parts; scutellum black haired; tergites 2 and 3: yellow spots end medianly in a grey spot; tergites 3 and 4: hind margin black; face: bare stripe blackish. 11-13 mm. Northern Europe, in Asia east to Pacific, Nearctic › Helophilus groenlandicus Fabricius Jizz: yellow markings on tergite 2 sharply point- ed at their inner corner, with a grey spot. 3.a. Thoracic dorsum: longitudinal lines figure 395. Helophilus lapponicus, abdomen of pale dust reach the hind margin over of male. their full width; tergite 4 always with figure 396. Helophilus lapponicus, abdomen yellow or white markings › 4. of female (after Van der Goot, 1981). 3.b. Thoracic dorsum: longitudinal lines of pale dust fade towards the scutellum and do not reach the hind margin of the black (figure 395, figure 396); face: bare thoracic dorsum; tergite 2 with large stripe blackish. 11-13 mm. Northern yellow spots, tergite 3 with much small- Europe, Nearctic › Helophilus lapponi- er yellow spots and tergite 4 completely cus Wahlberg (= Helophilus borealis black or with spots of white dust (in the Staeger) latter case formerly recognized as H. Jizz: quite like Eristalis at first sight, because of borealis); tergites 3 and 4: hind margin short and broad abdomen and placement of spots. 4.a. Face: longitudinal bare stripe black (figure 397). Females: tergite 3: yellow spots separated from front margin medianly › 5 4.b. Face: longitudinal bare stripe yellow (figure 398); tergites 2 and 3 with lemon yellow spots, tergite 4 with white to grey spots (figure 399, figure 400). Females: tergite 3: yellow spots touch front margin. 15-16 mm. Europe, in Asia east to Pacific › Helophilus trivittatus Fabricius figure 394. Helophilus bottnicus, abdomen of Jizz: large species, spots on tergites 2 and 3 very female (after Van der Goot, 1981). pale, tergite 4 always with grey dust spots. 120.

Load more