540 PROCEEDINGS OF THE NATIONAL MUSEUM vol. iii 



6. Acrolophus exaphristus Meyrick, incertae sedis 



Acrolophus exaphrista Meyrick, 1919, Exotic Microlep., vol. 2, no. 10, p. 279, 

 Nov. — McDunnough, 1939, Check List Lep. Can. & U.S. Amer., p. 103, no. 

 9572. 



Meyrick's original description follows; 



Acrolophus exaphrista — cf. 16 mm. Head, palpi, thorax dark fuscous; palpi 

 extremely long, recurved, reaching to beyond thorax, thickened with dense rather 

 rough scales throughout, broadly expanded at apex, joints of nearly equal length. 

 Antennae simple, shortly ciliated. Abdomen grey; uncus moderate, single, 

 slender, acute, rising from a triangular plate; valvae narrow, dilated terminally, 

 angles well-marked, terminal edge slightly curved. Forewings elongate, costa 

 gently arched, apex obtuse, termen rather obliquely rounded; 3 absent; rather 

 dark fuscous, somewhat mottled light brownish on costal half, especially along 

 costa; numerous small scattered dots on veins of raised blackish scales, anteriorly 

 white; round brownish-ochreous spots suffusedly irrorated whitish on fold at % 

 and in disc at %: ciha fuscous. Hindwings and cDia grey. 



Florida; one specimen. In this species the uncus appears to be truly single, 

 not merely with the two processes closely appressed. 



A. exaphristus, based on a single cf specimen from Florida, is here 

 treated as incertae sedis. The type, in the British Museum (Natural 

 History), has not been available to me for study. Photographs 

 furnished me by Mr. Tams and Dr. Clarke show the genitalia in 

 ventral aspect, the aedeagus, and a dorsal view of the pinned specimen 

 prior to dissection. Collectively they present a combination of 

 characters I have yet to observe in a North American specimen of 

 Acrolophus. 



After reading the original description, I first thought exaphristus 

 belonged to the simulatus species group and might even prove to be 

 simulatus itself. However, the photographs of the genitalia indicate 

 that this is not the case. In the simulatus group, the uncus is minutely 

 bifid at the apex, the gnathos is fused into a single flap, and the cucullus 

 of the harpe is shaped differently from the one shown in the photo- 

 graphs of exaphristus. 



From the information available, exaphristus may be briefly diag- 

 nosed as follows: small, labial palpi elongate, antennae "simple," 

 uncus single, gnathos paired, cucullus of harpe with apical portion 

 expanded, aedeagus linear but with base considerably expanded and 

 emarginate. The photograph of the aedeagus indicates that the 

 vesica may be armed with several small, apical cornuti. 



7. Acrolophus bicornutus, new species 



Figures 46-48 



Male. — Head, labial palpi, antennae, and thorax ochreous suffused 

 with fuscous. Labial palpi elongate, recurved back over head and 

 extending to or slightly beyond center of thorax, closely appressed to 



