The adult is about 3/4 inch (16-20 mm) in length and is dull brownish. Western conifer seed bugs are also often mistakenly identified as assassin bugs. Originally found only in the western United States, these bugs are now found all across the country, and even in parts of Canada. Western conifer seed bugs are also often mistakenly identified as assassin bugs. Western conifer seed bugs can fly readily and may make a buzzing noise if disturbed. One pest that you might think fits the definition of an invasive species is the bed bug because of its recent spread throughout the country. Western conifer seed bugs also have well developed scent glands that emit strong pine-like odors. These bugs do not bite or sting, nor do they cause damage to the home. First Record of the Western Conifer Seed Bug, Leptoglossus occidentalis Heidemann, 1910 (Hemiptera, Coreidae), from Palestine. The Western Conifer Seed Bug also seeks the warmth of your home to bunker down in for the winter. ... Western conifer seed bugs … There is a faint white zigzag stripe across the midpoint of its upper surface. For that reason they are sometimes incorrectly called stink bugs. They find their way into homes during the end of summer and early fall looking for a place to spend the winter. As an additional nuisance, though they are not true stink bugs, Western conifer seed bugs will release a “stinky” liquid when startled. The two insects vaguely resemble each other, but the innocuous western conifer seed bug gets the blame. Western Conifer Seed Bugs. Examples include the boxelder bug (Heteroptera: Rhopolidae; Boisia trivittata), the western conifer seed bug (Heteroptera: Coreidae; Leptoglosus occidentalis), some stinkbugs (Heteroptera: Pentatomidae) and many others. For that reason they are sometimes incorrectly called stink bugs. It is a type of leaf-footed bug that feeds on seeds of trees, especially pine. Western Conifer Seed Bug: An … It is not a destructive pest in the home, but merely a nuisance. Bulletin of Insectology 65 (2): 161-170, 2012 ISSN 1721-8861 Adaptation of the invasive western conifer seed bug Leptoglossus occidentalis to Trentino, an alpine region (Italy) Matteo TAMBURINI 1, Giorgio MARESI1, Cristina SALVADORI1, Andrea BATTISTI2, Fabio ZOTTELE1, Federico PEDRAZZOLI 1 1Centre for Technological Transfer, FEM-IASMA Research Centre, San Michele … Hizal E, … The WCSB is not regarded as a forest pest, but is of concern to nursery operations as the insects damage the endosperm of the maturing seeds. The Western Conifer Seed Bug is often mistaken by people for either the Asian Longhorned Beetle, or for an Assassin Bug.. The Western Conifer Seed Bug is a type of leaf-footed bug that feeds on seeds of trees, especially pine. Western conifer seed bugs also have well developed scent glands that emit strong pine-like odors.