During the 10-year period January 1, 1962-December 31, 1971, our diagnostic laboratory received a total of 1,208 accessions for disease diagnosis. Of these, 1,194 were in the phylum Arthropoda with most (1,173) in the class Insecta. Other arthropod classes represented were Arachnida (16), Crustacea (3), and Symphyla (2). Ten accessions were from the phylum Annelida, one from the phylum Chordata, and three were microbial cultures submitted for identification.

The following report is an abstract listing of the accessions received during this lO-year period, including brief statements as to the source of the material and the identity of the etiology involved. Each accession is cited under the submitted species. Orders, families, genera and species are in alphabetical order under their respective phyla. Indices to the submitted insects and other hosts (page 351) as well as to the pathogens (page 355), will assist in locating specific organisms.

The microbial pathogens isolated from the 1,208 accessions summarized in this report, including repeats and multiple diagnoses from individual accessions, totaled 88 viruses (52 nuclear polyhedrosis viruses, 7 cytoplasmic polyhedrosis viruses, 24 granulosis viruses, 5 noninclusion viruses), 1 rickettsia, 224 bacteria, 1 algae, 285 fungi, 122 protozoans (100 microsporidians, 18 schizogregarines, 4 coccidians), 5 nematodes, and 1 nematomorph. Entomophagous parasites and predators were found in 11 accessions, while other causes of death, such as starvation, mechanical injury, and toxic chemicals accounted for 7. In 315 accessions, no microbial pathogens were involved, and it was not possible to determine the etiologies in 29 accessions. New records of pathogens, hosts, and distribution are noted in the text.