Northern Naturalists - Invertebrate Tracking Field Guide

Tracks & Sign of Insects and Other Invertebrates
Field Guide updates, additions, corrections. Ongoing...
( taxa covered )

p. 151	The Andrena species that left this colorful deposit has been identified as A. crataegi. Click here to see the bee.
p. 151	The syrphid larva that left this tarlike smear has been identified as an Epistrophe species. Click here to see it.
p. 154	Correction: Although Drosophila sigmoides still appears to be a valid name, it evidently no longer applies to a spittlebug fly. The fruit flies associated with spittlebug spittle belong to the genus Cladochaeta, and you can download a 326-page monograph devoted to them here.
p. 156	Correction: The caterpillars that made these droppings were Haploa contigua, not H. confusa.
p. 158	Correction: Question marks (Polygonia interrogationis) do NOT construct frass chains. Thanks to Keith Wolfe for bringing this to our attention.
p. 172	Correction: The pine bark adelgid is native to North America, not introduced.
p. 173	Gregory A. Evans has examined the nymphal exuviae from the pictured whiteflies on arrowwood, and has determined them to be Trialeurodes pergandei.
p. 176	Correction: Although it's hard to see any detail in this photo, mycologist Larry Millman recognized these black spots as the anamorphic phase of a Lophodermium fungus. Here is what actual pinyon needle scale nymphs would look like when magnified.