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IX the spring of 1959, a special railway train carrying visitors to a national conference was the source of one of the largest outbreaks of food poisoning on record in this country. Of 450 passengers aboard nearly half were affected, 25 of whom required hospitalization. An interesting element of the event was that investigators found a clue which may lead to a new line of investigation, and so may enable health officials to identify agents of food poi¬ soning outbreaks which usually are reported with "origin unknown." Two meals were served aboard the special train during the overnight trip.a cafeteriastyle dinner served between 6:00 p.m. and 8:0C p.m., and breakfast between 4:00 a.m. and 6:30 a.m. However, the breakfast meal was not suspected, since the peak of the outbreak had The authors are with the Public Health Service. Mr. Hart is a sanitation consultant with the General Engineering Branch, Division of Engineering Serv¬ ices; Dr. Sherwood is an epidemic intelligence service officer with the Communicable Disease Cen¬ ter, Atlanta, Ga.; and Dr. Wilson is a bacteriologist with the Milk and Food Research Branch, Robert A.

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The West Indian genus Diastolinus Mulsant and Rey, 1859 (type species: Blaps clathratus Fabricius) is revised. The genus now includes 18 species divided among three species-groups, eight of which are described as new species herein: Diastolinus chalumeaui Hart and Ivie, new species (Guadeloupe Archipelago); Diastolinus leewardensis Hart and Ivie, new species (Leeward Islands); Diastolinus shieli Hart and Ivie, new species (Redonda); Diastolinus azuaensis Hart and Ivie, new species (Hispaniola); Diastolinus desecheo Hart and Ivie, new species (Desecheo Island); Diastolinus doyeni Hart and Ivie, new species (Puerto Rico); Diastolinus vaderi Hart and Ivie, new species (Hispaniola); and Diastolinus hoppae Hart and Ivie, new species (St. Lucia). The following new synonymies are proposed:

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