Discovered that most of Walter Linsenmaier's articles of the family are available online, in very nice scan quality (something I've been lacking for the two early ones), thought I'd link them here. They are all in OCR format as well, and since the text is super crisp it shouldn't be a problem searching the documents for text.
Linsenmaier - 1959 Revision der Familie Chrysididae (Hymenoptera) mit besonderer Berücksichtigung der europäischen Spezies
http://retro.seals.ch/cntmng?pid=seg-001:1959-1960:32::12
Linsenmaier - 1968 Revision der Familie Chrysididae (Hymenoptera) : zweiter Nachtrag
http://retro.seals.ch/cntmng?pid=seg-001:1968:41::10
Linsenmaier - 1984 Das Subgenus Trichrysis Lichtenstein in Nord- und Südamerika (Hym., Chrysididae, Genus Chrysis L.)
http://retro.seals.ch/cntmng?pid=seg-001:1984:57::493
The above articles taken from this list of articles from "Mitteilungen der Schweizerischen Entomologischen Gesellschaft / Bulletin de la Société Entomologique Suisse / Journal of the Swiss Entomological Society":
http://retro.seals.ch/digbib/vollist?UID=seg-001
There's a lot more chrysidid papers from other authors available from their repository.
And then there is:
Linsenmaier - 1982 Neue Chrysididae aus Indo-Australien (Hymenoptera)
http://www.zobodat.at/pdf/ENT_0003_0021-0025.pdf
Linsenmaier - 1985 Revision des Genus Neochrysis LINSENMAIER, 1959 (Hymenoptera, Chrysididae)
http://www.zobodat.at/pdf/ENT_0006_0425-0487.pdf
Linsenmaier - 1994 Grundriss der Chrysis ignita - Gruppe von Nordamerika (Hymenoptera, Chrysididae)
http://www.zobodat.at/pdf/ENT_0015_0481-0499.pdf
Linsenmaier - 1994 Beiträge zu Cleptes LATREILLE, 1802 (Hymenoptera, Chrysididae)
http://www.zobodat.at/pdf/ENT_0015_0513-0517.pdf
Linsenmaier - 1997 Altes und Neues von den Chrysididen (Hymenoptera, Chrysididae)
http://www.zobodat.at/pdf/ENT_0018_0245-0299.pdf
Linsenmaier - 1999 Die Goldwespen Nordafrikas (Hymenoptera, Chrysididae)
http://www.zobodat.at/pdf/ENTS_S10_0001-0281.pdf
From the "Entomofauna zeitschrift für entomologie" list of publications here, lots of other good articles available in this journal too (e.g. W. Arens, F. Strumia).
http://www.zobodat.at/publikation_series.php?id=1616 for example a search of "Chrysididae" link
I can also recommend these lovely drawings that Linsenmaier produced for the magazine "Du", scanned in very high definition and colour;
Linsenmaier - 1956 Fünf Tierzeichnungen [Zeichnungen Walter Linsenmaier]
http://retro.seals.ch/cntmng?pid=dkm-001:1957:17::1124
/Alex