Macrorrhinia Ragonot, 1887

Hayden, James E. & Landry, Jean-François, 2020, Arcola malloi (Pastrana), the alligatorweed stemborer, a new synonym of Macrorrhinia endonephele (Hampson) (Lepidoptera: Pyralidae: Phycitinae), Insecta Mundi 2020 (768), pp. 1-25 : 9

Key to Macrorrhinia Ragonot

The following key is global, including Neotropical species. It does not include M. placidella ( Zeller, 1848) , which is of dubious association and is known only from the unique, damaged lectotype ( Heinrich 1956).

1. Forewing color mostly gray, with distinctly contrasted black and orange scales in antemedial area....................................................................... 2

— Forewing color mostly orange, pale ochre, or cream, with black scales in antemedial area absent or diffuse................................................................... 4

2. Maxillary palpus of male without elongate scales; lobes of juxta rounded and not longer than wide; dilated part of ductus bursae tapered and narrower in posterior half................................................................... M. aureofasciella Ragonot

— Maxillary palpus of male with elongate scales; lobes of juxta acute or longer than wide; dilated part of ductus bursae of even width or with posterior half wider than anterior.......... 3

3. Gnathos with subapical process; lobes of juxta short and acute; signum present at juncture of ductus bursae and corpus bursae; distribution: Florida, USA...... M. dryadella (Hulst)

— Gnathos without subapical process; lobes of juxta round-ended and much longer than wide; signum absent; distribution: Argentina............... M. megajuxta (Neunzig and Goodson)

4. Forewing length ≥7.5 mm; valva with distal margin evenly curved; corpus bursae with long row of spines extended nearly to posterior end................ M. endonephele (Hampson)

— Forewing length ≤7.0 mm; valva with distal margin straight in ventral half because of extended sacculus; corpus bursae without spines or only a few spines inside ductus bursae........ 5

5. Forewing postmedial line absent ; phallus curved; appendix bursae present, almost as large and long as posterior half of corpus bursae; distribution: Galapagos Islands M.pinta LandryandNeunzig

— Forewing postmedial line present; phallus straight or nearly so; appendix bursae absent or present and small; distribution: Florida, USA............................................ 6

6. Forewing postmedial line interrupted; hind wing whitish and semihyaline; gnathos evenly tapered and curved; expanded part of ductus bursae small, containing a few small spines; corpus bursae without appendix......................... M. ochrella (Barnes and McDunnough)

— Forewing postmedial line continuous; hind wing smoky gray; gnathos not tapered, having parallel dorsal and ventral edges; ductus bursae not expanded near corpus bursae, without spines; corpus bursae with small appendix, about half the length of posterior half of corpus bursae................................ M. parvulella (Barnes and McDunnough)