Criorhina nigriventris

{{Short description|Species of fly}}

{{Speciesbox

| image =

| image_caption =

| genus = Criorhina

| species = nigriventris

| authority = Walton, 1911{{cite journal |last1=Walton |first1=W.R. |title=Notes on Pennsylvania Diptera, with two new species of Syrphidae |journal=Entomological News, and Proceedings of the Entomological Section of the Academy of Natural Sciences of Philadelphia |date=1911 |volume=22 |pages=318–322, 1 pl |url=https://www.biodiversitylibrary.org/page/2604369#page/382/mode/1up |access-date=4 August 2021}}

| display_parents = 5

| synonyms = *Criorhina aurata Curran, 1925{{cite journal |last1=Curran |first1=Charles Howard |title=Contribution to a monograph of the American Syrphidae north of Mexico |journal=The Kansas University science bulletin. |date=1925 |volume=(1924) 15 |pages=7–216, 12 pls |url=https://www.biodiversitylibrary.org/page/4391303#page/15/mode/1up |access-date=23 July 2021}}

• Criorhina intermedia Johnson, 1917{{cite journal |last1=Johnson |first1=C.W. |title=A new species of Criorhina from New England |journal=Psyche: A Journal of Entomology |date=1917 |volume=24 |pages=153–154 |url=https://www.biodiversitylibrary.org/page/11979982#page/187/mode/1up |access-date=5 August 2021}}
• Criorhina maritima Curran, 1924{{cite journal |last1=Curran |first1=C.H. |title=Four apparently undescribed Diptera from Canada |journal=The Canadian Entomologist |date=1924 |volume=56 |pages=250–253}}
• Criorhina mystaceae Curran, 1925
• Criorhina verbosa var. aurata Curran, 1925
• Milesia gnava Harris, 1835{{cite book |last1=Harris |first1=T.W. |title=Insects. Pp. 553-602. In Hitchcock, E., Report on the geology, mineralogy, botany, and zoology of Massachusetts. 2nd Edition. |date=1835 |publisher=J. S. & C. Adams |location=Amherst |pages=[4] + 702 pp., 19 pls, 3 maps}}

}}

Criorhina nigriventris , the bare-cheeked bumble fly, is an uncommon species of syrphid fly observed across the northern United States, the Appalachian Mountains and southern Canada. Hoverflies can remain nearly motionless in flight. The adults are also known as flower flies for they are commonly found on flowers, from which they get both energy-giving nectar and protein-rich pollen. The larvae of this genus are found in decaying wood.{{cite journal |last=Rotheray |first=G.E. |year=1993 |title= Colour Guide to Hoverfly Larvae (Diptera, Syrphidae) in Britain and Europe |journal=Diperists Digest |volume=9 |pages=155 |url= https://diptera.info/downloads/df_1_9_Colour_Guide_to%20Hoverfly_Larvae.pdf }}{{cite book |last=Skevington |first=Jeffrey H |author-link= |date=2019 |title= Field Guide to the Flower Flies of Northeastern North America. |url= |location= |publisher= |page= |isbn= 9780691189406 }}