Videnskabelige meddelelser

Videnskabelige meddelelser


dorsocentral bristles; in the same place (p. 196) he records Bergen-

slainmi, of which species he knew only the female, which he loc-

ates by its four dorsocentral bristles. In 1910 Malloch (Ann. Scott.

Nat. Hist. 21) unites the two species, because he had a pair in

copula of which the male had two, the female four dorsocentral

bristles, and he therefore declares, that the male of Bergenstammi

has only two dorsocentral bristles. In 1912 Wood (1. c. XXIII, 95)

consents with this uniting of his species with Bergenstammi. Fi-

nally Schmitz treates in 1917 (Biol. Zentralbl. 37, 34) and 1918

(Jahrb. van het Natuurh. Genootsch. in Limburg, 1917, 92) as

Bergenstammi the same species, and remarks that the male has

two, the female four dorsocentral bristles, so that he thinks it a

failure that Becker had ascribed the male four bristles. Neither

Malloch nor Schmitz made any mention of the male palpi.

From the material of shells of species of Heliæ which, as re-

marked above, was sent to me in 1918 from Mr. L.Jørgensen, I

bred in April a species which I after Becker determined as Ber-

genstammi; it completely agreed with Becker's description, the

male had the bristles on the palpi very small and both sexes showed

four dorsocentral bristles, and quite the same was the case with

several specimens taken with the net on various localities, all my

specimens were in these respects quite alike. As I did not under-

stand this, but thought it possible, that my species might be an-

other than that described by Schmitz, I sent him a male together

with puparia, and he also was of opinion, that it was another spec-

ies than his Bergenstammi, and he kindly sent me this latter

species together with puparia, which, as he remarked, also were

different from the puparia sent by me. I now examined both spec-

ies and found them distinct; they represent evidently two very

similar species, one with four dorsocentral bristles in both sexes

and with the male palpi almost nude, the other with two dorso-

central bristles in the male, four in the female and with the male

palpi with normal armature, and it is easily established that the

former is Bergenstammi Mik, the latter domestica Wood, as also

supposed in Schmitz's letter to me. As seen the males of these

two species are recognized at once by the characters given, but

also the females may be distinguished with certainty by charact-

ers which are common to both sexes; thus in Bergenstammi the

Vidensk. Medd. fra Dansk naturh. Foren. Bd. 71. 9

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