no. 3646 DINEUTUS — WOOD 3 



In my analysis of these populations, it appears that Roberts' 

 concept of D. analis is represented by the dark ventered form of 

 Dineutus ranging from Texas to western Florida. This was confirmed 

 by comparison of these specimens with a female paratype of D. 

 analis from the collection of R6gimbart. Also confirmed was the 

 suspicion that the illustration of the male genitalia of D. analis in 

 Roberts' 1895 paper (his Plate Vl-lOb), drawn for him by Professor 

 John B. Smith (Roberts' p. 281) was incorrect and in fact did not 

 apply, as drawn, to any species of American Dineutus. The female 

 genitalia, although not as distinct as the male, nevertheless offer 

 good diagnostic characters, and the female genital lobes of Regim- 

 bart's paratype are the same as those of Roberts' (and later authors') 

 concept of D. serrulatus from Florida. This, with other morphological 

 characters, indicates that the two forms are conspecific and neces- 

 sitates the following changes in nomenclature. 



Dineutus serrulatus LeConte 



Dineutus serrulatus serrulatus LeConte 



Dineutus serrulatus LeConte, 1868, pp. 366, 367.— Hatch, 1925, p. 106. 

 Dineutus (Cyclinus) serrulatus. — Ochs, 1926, p. 121. — Hatch, 1930, pp. 18, 20-22. — 



Young, 1954, pp. 143, 145, 148-150. 

 Dineutes serrulatus. — Schwarz, 1878, p. 438. — R6gimbart, 1882, p. 415; 1884, p. 



469.— Severin, 1889, p. 154.— R6gimbart, 1892, p. 739.— Roberts, 1895, pp. 



279-282, 286.— R4gimbart, 1902, p. 4; 1907, p. 145.— Ahlwarth, 1910, p. 7.— 



Leng and Mutchler, 1918, pp. 95, 96.— Blatchley, 1919, p. 316.— Leng, 1920, 



p. 82.— Brimley, 1938, p. 132. 



Length 9-12 mm; broadly oval, more or less narrowed anteriorly; 

 dorsal surface shining, black, striae faint; exterior apical angle of 

 elytra moderately sinuate, moreso in the female, elytral apices slightly 

 dehiscent at suture, sutural angles obtuse, slightly sinuate, not pro- 

 duced, serrulate; undersurface shining, uniformly castaneous; hypo- 

 mera orange; anterior leg castaneous; anterior tibia narrow at basal 

 one-fourth to one-third, then broadened and subparallel to apex, 

 apex truncate, exterior apical angle rounded, female less so than 

 male; anterior femora of male always with a distinct, acute tooth. 



Because lectotypes have not been specified for LeConte's two speci- 

 mens, I hereby designate the following: 



Hololectotype: a male in the Museum of Comparative Zoology, 

 the pin bearing a pink disc with a red label designating "Type 6094" 

 and a white paper label on which is written "D. serrulatus" in ink. 

 The pink disc, LeConte's indication of "middle states" on the holo- 

 lectotype, is unexplainable since this subspecies is found only in 

 Alabama, Florida, and Georgia, and its boundaries are well limited. 

 "D. serrulatus" is written in cursory writing and in LeConte's hand 

 (Horn and Kahle, 1936). 



