54 PROCEEDINGS OF THE NATIONAL MUSEUM vol. 121 



July. Rhode Island: Washington; July. South Carolina: Oconee; March. 

 West Virginia: Greenbrier; July. 



Melanotus americanus is one of the smaller species of North American 

 Melanotus. This featm:"e, with the small thu"d antennal segment and 

 high rounded pronotiim bearing small, scattered punctures, makes 

 the species more readUy recognized than many others. 



Examination of the types of angustatus indicates that this species 

 has been misidentified for many years. The type series is mixed, 

 but the first is definitely americanus and has been selected as the 

 lectotype. This specimen has been dissected and the identification 

 has been confirmed by M. C. Lane. 



33. Melanotus cribriventris Blatchley 



Figures 6 A;, 11 /i 



Melanotus cribriventris Blatchley, 1910, p. 747; 1930, p. 33. 



Melanotus longicornis Blatchley, 1910, p. 746; 1930, p. 35.— Thomas, 1941, p. 258. 



[New synonymy.] 

 Melanotus blatchleyi Leng, 1918, p. 205. [New name for longicornis Blatchley, 



not Candfeze, 1860. New synonymy.] 



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

 vestiture, evenly distributed over body. 



Head: Front with shallow to marked anterior depression, margin 

 dark reddish brown, not strongly protuberant above clypeus, angulate 

 and blunt when viewed from above; parantennal fovea large, deep 

 and well defined, nasale higher than wide, prominently raised. Man- 

 dible with deep, rounded pit. Antenna exceeds tip of hind angle by 

 3 to 3K segments, segments 2 and 3 subequal, flagellar segments 

 elongate and slender, segment 4 about twice as long as maximum 

 width; erect male hairs long and shaggy. 



Pronotum wider than long; punctures at center separated by 

 distance equal to less than own diameter, subequal to size of punctures 

 on front; sides of pronotum straight, divergent posteriorly with 

 slight anterior cm-vature; hind angles divergent, with strong carina, 

 extending cephalad of base. Genitalia as figured; paramere without 

 apical blade. 



Elvtron: 7.2-7.6 mm. 5 spec. 



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

 internal genitalia as figured, bursa with about 20 sharp, thornlike 

 spines, accessory gland long and very slender, spermathecal duct 

 branched near base. 



Elytron: 7.8 mm (7.7-8.1). 8 spec. 



Types. — Type of longicornis: Male, Orange Co., Ind., May 31, 

 1904. Not seen by us, but studied by M. C. Lane and determined to 

 be same as cribriventris. 



