60 PROCEEDINGS OF THE NATIONAL MUSEUM vol. 121 



angiUate and flattened in front when viewed from above, sometimes 

 depressed in center; parantennal fovea small, deep and crescent shaped, 

 foveal tragus sometimes well developed ; nasale usually developed but 

 not strongly protuberant, wider than high. Mandible with small 

 teardrop- or slit-shaped pit. Antenna light to dark reddish brown and 

 lighter than body in dark specimens, exceeds tip of hind angle by 1 

 to 1)2 segments, ratio of segments 2:3:4=3:4:7, flagellum usually 

 strongly serrate, segment 4 about IK times as long as maximum width; 

 erect male hairs short, variable from dense to sparse, but always 

 evident. 



Pronotum as long as or little wider than long; punctures subequal or 

 clearly as large as those on front, separated by distance equal to less 

 or more than own diameter. 



Female. — ^Antenna exceeds tip of hind angle by about one-half 

 segment; sides of pronotum generally rounded; bursa with numerous, 

 plaquelike spines, spermathecal duct branching at apex of biu-sa. 



39. Melanotus longulus longulus (LeConte) 



Figures 7e, 12c,d 



Cratonychus longulus LeConte, 1853, p. 473. 



Melanotus longulus. — Candeze, 1860, p. 339. — Horn, 1874, p. 23. — Van Dyke, 

 1932, p. 331.— Fall, 1934, p. 23.— Van Dyke, 1942, p. 51.— Stone and How- 

 land, 1944, p. 1. 



Reddish brown to black, lighter colored in Southwest. Antenna 

 flagellum usually moderately serrate. Pronotal punctures subequal 

 to those on front in Southwest and larger and denser in California, 

 sides of pronotum nearly straight behind small anterior ciu-vatm-e, 

 usually slightly convergent posteriorly. 



Male genitalia as figiu-ed; apical blade sharply angulate with sharp 

 outer, basal corner, concavity at base of blade well developed in 

 Arizona and New Mexico and poorly developed in California. 



Female internal genitalia as figiu-ed, accessory gland longer than 

 biu-sa and very slender. 



Male elytron: 7.2 ±0.6 mm (6.5-8.8). 50 spec. 



Female elytron: 7.8±0.6 mm (6.3-9.0). 24 spec. 



Types.— Lectotype of longulus: Male, labelled with gold circle 

 "San Diego, Calif." (MCZ 2506). First specimen of type series 

 selected as lectotype by authors in 1962. 



Distribution. — Southwestern U.S. south of Tehachapi Mtns., 

 California, Great Basin, and Baja California. 



Arizona. Cochise Co.: Chiricahua ISIts., June 20, 1950; Douglas, Aug.: Hua- 

 chuca Mts., 1960 m, Aug. 9, 1952; Portal, 2420 m, July 20, 1944; Whetstone 

 Mts., SE, Aug. 10, 1952. Coconino Co.: Oak Creek Cyn., July 1941; Williams, 

 July 2, 1953. Graham Co.: Graham Mts., Aug. 1, 1957. Maricopa Co.: 



