Prionoxystus robiniae

{{Short description|Species of moth}}

{{Speciesbox

| image = Prionoxystusrobiniae.JPG

| image_caption =

| taxon = Prionoxystus robiniae

| authority = (Peck, 1818)

| synonyms =

• Cossus robiniae Peck, 1818
• Xystus robiniae
• Cossus crepera Harris, 1834
• Cossus plagiatus Walker, 1856
• Xyleutes querciperda Packard, 1864
• Xyleutes crepera Packard, 1864
• Cossus reticulatus Lintner, 1878
• Prionoxystus quercus Ehrmann, 1893
• Cossus zabolicus Strecker, 1898
• Prionxystus robinae Barnes & McDunnough, 1911
• Prionoxystus mixtus Barnes & Benjamin, 1923
• Prionoxystus subnigrus Barnes & Benjamin, 1923
• Prionoxystus flavotinctus Barnes & Benjamin, 1923

}}

Prionoxystus robiniae, the carpenterworm moth or locust borer, is a moth of the family Cossidae.{{cite web |author1=Anweiler, G. G. |author2=Robinson, E. |name-list-style=amp |url=https://search.museums.ualberta.ca/g/2-2294 |title=Species Details Prionoxystus robiniae |website=University of Alberta Museums |publisher=E.H. Strickland Entomological Museum |access-date=November 9, 2020}} It was first described by Peck in 1818 and it is found in southern Canada and most of the United States.

File:Prionoxystus_robiniae.jpg

File:Prionoxystus_robiniae_larva.jpg

The wingspan is {{convert|43–85|mm|abbr=on}}. Adults are on wing from May to July depending on the location.

The larvae feed on locust, oak, chestnut, poplar, willow, maple and ash. The species is considered a pest, because the tunnels the larvae create decrease the value of hardwood lumber.