42 PROCEEDINGS OF THE NATIONAL MUSEUM vol. 121 



21. Melanotus hyslopi Van Zwaluwenburg 



Figures 51, 10/ 



Melanotus hyslopi Van Zwaluwenburg, 1921, p. 210. — Thomas, 1941, p. 261. — 

 Dietrich, 1945, p. 69.— Fattig, 1951, p. 22. 



Male. — Body color reddish brown, covered with white or yellowish 

 vestiture, evenly distributed over body. 



Head: Front with pair of shallow anterolateral depressions, not 

 strongly protuberant above clypeus, angularly produced into trun- 

 cated projection when viewed from above; parantennal fovea large 

 and deep, excavated as deep as length of antennal segment 2, crescent 

 shaped, foveal tragus weakly developed; nasale strongly protuberant, 

 as wide as high. Mandible with deep, rounded, or ovate pit. An- 

 tenna exceeds tip of hind angle by 2-3 segments, segment 3 inter- 

 mediate to 2 and 4, reddish brown, flagellar segments rather elongate, 

 segment 4 about twice as long as maximum width; erect male hairs 

 long, but sparse. 



Pronotum wider than long, ratio of width/length=1.05-1.18; 

 punctures at center usually separated by distance equal to more than 

 twice own diameter, smaller than those on front; sides of pronotum 

 straight behind anterior curvature and divergent posteriorly; hind 

 angles divergent, with carina usually extending well cephalad of base 

 of hind angle. Genitalia as figured; paramere without apical blade. 



Elytron: 8.5±0.3 (7.6-9.1). 60 spec. 



Female. — Antenna exceeds tip of hind angle by 1^2-2 segments; 

 internal genitalia as figured, bursa with large swelling at base of ac- 

 cessory gland, gland clavate, elongate apex of bursa looped, sper- 

 mathecal duct branches near base, diverticulum very short and 

 curled. 



Elytron: 8.7 ±0.4 mm (7.6-9.4). 55 spec. 



Type.— Holotype: Male, South Mountain, Md. (USNM 24561). 

 Not studied by authors. 



Distribution. — New Hampshire south to North Carolina and 

 west to Wisconsin and Illinois. 



Connecticut: Litchfield; June. Illinois: Champaign, McHenry; July, Sep- 

 tember. Maryland: Anne Arundel, Baltimore, Frederick; June, July. Mas- 

 sachusetts: Barnstable, Bristol, Essex, Hampshire, Middlesex; June, August. 

 Michigan: Oceana; August. Mississippi: Forrest; April. New Hampshire: 

 Carroll; August. New Jersey: Atlantic, Bergen, Camden, Ocean; May, July. 

 New York: Erie, Essex, Niagara, Rockland, Suffolk, Sullivan, Tompkins; May, 

 September. North Carolina: Buncombe, Macon; July. Ohio: Delaware, 

 Fairfield, Hocking, Summit; May, July. Pennsylvania: Dauphin, Monroe, 

 Northampton, Philadelphia; May, July. Tennessee: Sevier; June, July. 

 Virginia: Giles, Rockbridge; July, August. Wisconsin: No other data. 

 Ontario: Pr. Edward Co.; June. 



