All posts tagged with entomology

The family Syrphidae, commonly called hover flies or flower flies, include some 6,000 living species. As “one of the most abundant groups of flower visiting insects”, with adults of most species feeding almost exclusively on pollen and nectar or honeydew, these flies are among the most important pollinators, both for wild plants and numerous crops.

The multi-volume Diptères exotiques nouveaux ou peu connus (1838-[43]) by Justin Macquart contains the first descriptions of numerous Diptera species, including many members of the Syrphidae. Systema Dipterorum, the biosystematic database of world Diptera, attributes 430 Syrphidae names to Macquart.

“Macquart wrote so many early Syrphidae genus and species descriptions that it’s almost impossible to write a syrphid taxonomic paper without referencing this title at some point,” explains Dr. Andrew D. Young.

Young is a University of California, Davis postdoc, working out of the California Department of Food and Agriculture Plant Pest Diagnostics Center, where he specializes in Diptera taxonomy and phylogenetics. Although he studies Tephritidae (fruit flies) in his current position, most of Young’s entomological training has been focused on Syrphidae. While Macquart’s monographic series is an essential resource for this group, it’s not easy to come by.

“Each volume is several hundred pages, and was published in the mid 1800s, so hardcopies are not particularly easy to get ahold of,” explains Young. “Most of the time when you do find a hardcopy, it’s one that’s been photocopied so many times it’s barely legible.”

Fortunately, Diptères exotiques nouveaux ou peu connus is freely available on the Biodiversity Heritage Library (BHL).

Insects trapped in amber. For anyone who has seen Jurassic Park, this description immediately conjures up familiar imagery. In the movie, such a fortuitously-preserved mosquito provided the means to bring dinosaurs back to life. While that may be the realm of science fiction, in the realm of science, such amber time capsules are still a valuable window into the past, allowing scientists today to examine ancient specimens and, sometimes, discover new species.

There are more described species of beetles (order Coleoptera) than any other group of organisms on the planet. With over 350,000 described extant and extinct species and subspecies, beetles represent about 40% of all described arthropods and about 25% of all described species.

One of the myriad families of beetles is Monotomidae, with over 250 described species [3]. Commonly called minute clubbed beetles, the family includes such species as Europs frontalis (found primarily in the tropics) and Pycnotomina cavicolle (found exclusively in forested regions of eastern North America).

Dr. Thomas McElrath, Insect Collections Manager at the Illinois Natural History Survey, has been studying the systematics of Coleoptera for nine years. He is currently working on compiling a worldwide checklist of the Monotomidae. The Biodiversity Heritage Library is a crucial resource for his research on this project.

When Louise Rienzi wrote her guide on General Instructions for Rearing Silkworms, in 1887, she was part of a movement attempting to establish a viable silk industry for the United States. The epicenter of the new industry was California, where Louis Prevost, a French botanist, was the first to grow silkworms and produce cocoons, in 1860. The physical environment was favorable, and the industry saw some success before it eventually faded.

Several groups were formed to promote the industry, including the State Board of Silk Culture in San Jose. This organization was responsible for printing and distributing Louise Rienzi’s sericultural manual in the late 1880s. Louise Rienzi also served as Secretary of the State Board and issued official reports on the monthly and annual meetings as well as the contributions of various committees, such as the Committee on Mulberry Trees, Eggs and Cocoons.