Arcola malloi (Pastrana), the alligatorweed stemborer, a new synonym of Macrorrhinia endonephele (Hampson) (Lepidoptera: Pyralidae: Phycitinae) Author Hayden, James E. Florida Department of Agriculture and Consumer Services, of Plant Industry, 1911 SW 34 th Street, Gainesville, FL 32608 Author Landry, Jean-François Collection of Insects, Arachnids, and Nematodes, Agriculture & and Development Centre, 960 Carling Ave, Ottawa, ON K 1 A 0 text Insecta Mundi 2020 2020-05-29 2020 768 1 25 journal article 10.5281/zenodo.5353606 1942-1354 5353606 FA113144-2E1D-4492-963F-FB766029834F Macrorrhinia ochrella ( Barnes and McDunnough, 1913 ) Fig. 8–10 , 14–15 , 23–24 , 32–33 , 40–42 , 48 , 59–60 , 62–67 , 69 Divitiaca ochrella Barnes and McDunnough 1913: 183 . Divitiaca simulella Barnes and McDunnough 1913: 183 ; synonymized by Neunzig 2003: 266 . Diagnosis. The forewing length is 4.5–6.5 mm. The maculation ( Fig. 8–10 ) is cream with scattered black scales; good specimens have faint pink streaks on the anal fold in the basal area and along the radial veins. The gnathos ( Fig. 32–33 ) has a wide base in sagittal view. The dilated section of the ductus bursae ( Fig. 59–60 ) is reduced and looks like a boot, and it has one major row of spines on the posterior side and, in some specimens, a row of smaller spines on the anterior side ( Fig. 62–67 ). The posterior margin of the antrum ( Fig. 69 ) is transverse and slightly convex or sinuate with slender lateral projections that are considerably wider than the ductus bursae. Material examined. USA , FLORIDA , Broward Co. : 1 male (2013), MGCL slide 1289 ; Monroe Co. : 18 (1987, 1988, 1990, 1992, 1994–1996, 2019), MGCL slides 5326, 5742, 5743, 5753–5756 ; Everglades : 1 female (1961), slide PYR 2197 ( CNC ) . Divitiaca ochrella syntypes ( USNM ): There are two syntypes in the USNM , one male and one female , with red-bordered labels inscribed “ Divitiaca ochrella B. & McD Type [sex symbol]” in McDunnough’s handwriting, with collecting data matching the description. The male was illustrated in Barnes and McDunnough (1913 , plate I, figure 3), and the genitalia later dissected by Heinrich (genitalia and wings on separate slides). The female was undissected. Because the male and the female are similarly inscribed as “Type” and the female genitalia of Macrorrhinia afford better specific differences, we selected the female for the lectotype and dissected it. Divitiaca ochrella lectotype female, here designated , labelled: “Everglade [sic], Florida ” ; “Apr 8-15”; “ Divitiaca ochrella B. & McD Type ♀ ” ; “Barnes Collection” [red-bordered and lined]; “Genitalia slide by JF Landry ♀ USNM 130,222 ” [green] ; “ LECTOTYPE ♀ Divitiaca ochrella Barnes & McD. by J.-F. Landry 2019” [orange] ; specimen # USNMENT00657700 ( USNM ). One paralectotype ♂ , labelled as lectotype , additional label “Photograph Pl. 1 No. 3” [pale blue], slide USNM 101842, specimen # USNMENT00657701. One male from Everglade [sic] from the Barnes Collection dated “Apr 16-23” is not a syntype (slide USNM 144171, specimen # USNMENT00657702). Divitiaca simulella syntypes ( USNM ): as for D . ochrella , there is a pair of USNM syntypes bearing the inscription “Type”, as well as a third male specimen labelled as “cotype”, all on red-bordered labels in McDunnough’s hand. The male “type” was illustrated in Barnes and McDunnough (1913 , plate I, figure 6) and its genitalia later dissected by Heinrich. The female “type” and the cotype were undissected. For the same reason as D . ochrella , we selected the female for lectotype and dissected it. Divitiaca simulella lectotype female, here designated , labelled: “Everglade [sic], Florida ” ; “Apr 8-15”; “ Divitiaca simulella B. & McD Type ♀ ” ; “Barnes Collection” [red-bordered and lined]; “Genitalia slide by JF Landry ♀ USNM 130,223 ” [green] ; “ LECTOTYPE ♀ Divitiaca simulella Barnes & McD. by J.-F. Landry 2019” [orange], specimen # USNMENT00657704 ( USNM ) . One paralectotype male, labelled as lectotype , additional label “Photograph Pl. 1 No. 6” [pale blue]; slide USNM 101844 , specimen # USNMENT00657703. One paralectotype male, labelled as lectotype except for the word “Cotype”, slide USNM 144162 , specimen # USNMENT00657705 . Additional ♂ specimen: Everglade [sic], Apr. 10, ’12; slide USNM 144172 , specimen # USN- MENT00657706 ; a white label “ Divitiaca simulella B & McD” is by a different hand. Comments. The slight difference in size and coloration between M. ochrella and M. simulella led Heinrich (1956) to doubt that they were different species, nevertheless he maintained them separate. He did not illustrate the genitalia of M. simulella citing their close similarity to those of M. ochrella . Neunzig (2003) judged them to be conspecific on account of finding no significant difference and synonymized them. We observed that the female genitalia of the two lectotypes , undissected prior to the present study, differed slightly in the shape of the corpus bursae (a possible artefact of stretching), the spination at the anterior end of the ductus bursae near its inception into the corpus bursae (this area is crumpled in the M. ochrella lectotype slide so difficult to compare), the size of the ostium bursae (proportionally wider in M. ochrella ) and the extent of the zone of microtrichia of the sinus vaginalis (more extensive in M. ochrella ). Recently observed specimens from Monroe Co., Florida showed variation in female genitalia similar in extent to intraspecific variation exhibited by M. endonephele . We conclude that this supports maintaining their synonymic status.