48 JOHN SAHLBERG, BIDRAG TILL NORDVESTRA SIBIRIENS INSEKTFAUNA. 
FH. nigritarsis J. SAHLB. in litt. 
Habitat in pratis inundatis in territorio silvoso ad flumen Irtisch et Obi freqventer; ad Selenkina, Spirina, 
Tobolsk, Jelisarovo, Samarovo, Troitski, Narym et Tschulim captus. — Europa media et meridionalis. — Mus. 
Holm. et Helsingf. 
280. Hydroporus depresssus FaABrR. — AuBb Icon. V, t. 26, f. 4. — Spec. gen. Hydroc. 306, 27. — 
THoms. Sk. Col. II, 19, 12. — SreioL. Faw. Balt. 468. — Geum. et Har. Cat. Col. 432. — Dytiscus PABR. 
Syst. El. I, 268, 32 (1801). 
In flumine Obi in territorio silvoso ad monasterium Troitski ?2/; et in territorio aretico prope oppidum 
Beresov ”/; (BERGROTH) captus. — Europa borealis et media. — Mus. Holm. et Helsingf. 
281. Hydroporus assimilis Park. — SturRM Deutschl. Ins. IX, 13, 5, t. 205, f. c, OC. — SCHAUM 
Ins. Deutschl. I, II, 33, 28. — GEemMm. et Har. Cat. Col. 430. — Dytiscus PArx. Faun. Svec. 226,51 (1798). 
— Hydroporus frater (KUNzE) AvBk Icon. V, t, 28, f. d. — Spec. gen. Hydroc. 328, 41. 
Habitat in aqvis stagnantibus ad margines fluminum; in territorio silvoso ad Obi prope oppidum Surgut 
31/1 ad vicum Kuschevat 5/; (BERGROTH), prope ostium fluminis Sosva 3/g (BERGROTH) nec non in territorio 
arctico ad flumen Jenissej prope ostium fluminis Kurejka !$/3! et ad vicum Chantaika 16/,! lectus. — Britannia, 
Germania, Gallia, Austria. — Mus. Helsingf. 
282. Hydroporus alpinus PayrK. — THoms. Sk. Col. II, 19, 3. — AuBE Spec. gen. Hydroc. 321, 37. 
— GeMM. et Har. Cat. Col. 430. — Dytiscus Park. Faun. Svec. 226, 90 (1798). 
In rivulo alpino in territorio frigido prope vicum Dudinka ?9/, unicum specimen inveni. — Lapponia, 
Karelia rossica. — Coll. Sahlb. 
283. Hydroporus Sammarkii SakHuiB. — TuHoms. Sk. Col. II, 18, 8. — ScHavum Ins. Deutschl. I, II, 
47, 21. — Gumm. et Har. Cat. Col. 440. — Hyphydrus SAuLB. Ins. Fenn. 172, 5 (1826). — Hydroporus 
assimilis AuvBR Icon. V, t. 29, f. 2. — Spec. gen. Hydroc. 9303, 44. 
In rivulis lapidosis in territorio arctico et frigido prope vicum Chantaika ?!Y/,! et ad vicum Dudinka 
29/-1 captus. — Europa borealis et media alpina. — Mus. Holm. et Helsingf. 
284. Hydroporus septentrionalis GYLL. AuBB Icon. V, 247, 16, t. 29, f. 1. — Spec. gen. Hydroc. 
J31l, 43. — THoms. Sk. Col. II, 18, 10. — ScHaum Ins. Deutschl. I, II, 46, 20. — GEMmM. et Har. Cat. 
Col. 340. — Hyphydrus GYuL. Ins. Sv. IV, 389, 6—7 (1827). i 
In territorio aretico in ripa fluminis saxosi sonantis Chantaika ?9/; specimina duo inveni. — Europa 
borealis et media alpina; Sibiria orientalis. — Mus. Holm. 
285. Hydroporus gvriseo-striatus DE GEER. — AuBE Icon. V, 255, 22, t. 30, f. 1. -— Spec. gen. 
Hydroc. 341, 43. — THoms. Sk. Col. II, 21, 18. — ScHAUM Ins. Deutschl. I, II, 39, 30. — GEMM. et HAR. 
Cat. Col. 434. — Dytiscus DE GEER. Ins. IV, 103, 11 (1774). 
In aqva stagnanti in territorio frigido prope vicum Dudinka ?!/, unicum specimen invenit TRYBOM. — 
Europa arctica, borealis et media alpina, Sibiria orvientalis, America borealis. — Mus. Holm. 
286. Hydroporus dorsalis FaABrR. — AuBB Icon. V, t. 31, f. 4—6. — Spec. gen. Hydroc. 9362, 6J. 
—  ScHAUM JIns. Deutschl. I, II, 57, 32. — THoMs. Sk. Col. II, 19, TAN== GEMM. et ElAR. Cat. Oo Ad. 
— Dytiscus FABR. Syst. El. I, 269, 57 (1801). 
In territorio silvoso prope oppidum Jenisseisk ?9/; et ?!/.! captus. — Europa tota. — Mus. Helsing. 
Var. b. THoms. Sk. C, I. c, var. — Hyphydrus figuratus GYLL. Ins. Sv. IV, 387, 10—11. 
In territorio arctico prope ostium fluminis Kurejka 18/3! captus. — Europa arctica et alpina. — Coll. Sahlb. 
287. Hydroporus lapponum GyYLL. — AuBB Spec. gen. Hydroc. 961, 2. — THoms. Sk. Col. IT 20, 15. 
—- GEMM. et Har. Cat. Col. 435. — Hyphydrus GyYiu. Ins. Sv. I, 932, 16 (1808). 
Habitat in aqvis stagnantibus in territorio frigido ad flumen Jenissej freqventissime, in territorio arctico 
minus freqventer et tantum prope vieum Chantaika 15/-! captus; in territorio silvoso ad flumen Obi prope 
monasterium Kondinsk unicum specimen invenit BERGRoOTH. — Europa arctica. — Mus. Holm. et Helsingf. 
Var. b (rufino): elytris, antennis prothoracisqve lateribus plus minusve late rufo-ferrugineis. 
H. Kolströmi J. SAHLB. Enum. Col. Carn. Fenn. 145, 264, 
li 
In territorio frigido prope vieum Dudinka ?1/,! et in insula Nikandrovski ostrov 12/5! nonnulla speci- 
mina capta. — Lapponia. — Coll. 'Sahlb. 
Var. ce (9) (opacino): corpore supra opaco, subtilissime punctato. 
Habitat in societate cum typo in territorio frigido rarvius. — Mus. Holm. 
Obs. Species haec in Sibiria aretica magnitudine, statura et colore satis variat; specimina nonnulla in 
insula Nikandrovski ostrov lecta Lapponicis multo majora sunt et formam H. Kolströmi m. cum typo conjungunt. 
STERNER SED Fr 
