240 ERNEST A. BACK. 



one-third the distance from its base. In nature this is con- 

 cealed by the pubescence and is easily overlooked. Whether 

 or not the rare C. aurulentus bears a similar projection cannot 

 be determined until more material is at hand. I do not con- 

 sider the difference in the shape of the terminal segment, as 

 found here, of any generic value, for the difference in the 

 outline between the terminal segments of aurulentus and cru- 

 ciatus is no less than that between cruciatus and cornutus. 



Can it be that Dasypogon cornutus Wiedemann, which Prof. 

 Johnson has made the type of this genus, is an extreme var- 

 iation and that the annectant species may be found to bridge 

 this seeming difference? 



Type. — Dasypogon cornutus Wiedemann. Two female speci- 

 mens in the collection of Prof. C. W. Johnson, Curator of the 

 Boston Society of Natural History. 



Ceraturgopsis cornutus (PI. VII, fig. 6.) 



Dasypogon cornutus Wiedemann, Auss. Zw., I, 382, 1828. 



Dasypogon cornutus Osten Sacken, Cat., 66, 1878 (syn. of Cer- 

 aturgus cruciatus Say). 



Ceraturgopsis cornutus Johnson, Psyche, X, 111, 1903 (figure of 

 antenna) . 

 9- — Length 16-18 mm. — Black, similar to Ceraturgus cruciatus but 

 more robust and more pronounced golden pruinose. Head everywhere, 

 except on the ocellar tubercle, with thick golden bloom; pile of mystax, 

 beard and bristles and pile of occiput also golden; antennae black; 

 segment 1 yellow, segments 1 and 2 short, subequal; segment 3 long 

 and slender, segment 4 small, very short; segment 5 more or less 

 rounded with a slight lobe-like projection on the outer side near the 

 apex bearing a small spine, the entire segment wholly free from the 

 pubescence found in Ceraturgus cruciatus and aurlentus. Thorax 

 everywhere golden pruinose, except along the sutures of the pleural 

 scerites; on the broad median geminate stripe extending backward 

 almost to the scutellum, and on two rounded lateral spots, one anterior, 

 the other posterior, to the transverse suture, reddish-brown; the lateral 

 spots behind the transverse suture coalescing with the median stripe. 

 Abdomen black, polished; the posterior margins of all the segments 

 broadly golden pruinose. Legs robust, testaceous. Wings yellowish, 

 the veins wholly so; the submarginal and posterior cells open. All the 

 pile and bristles of the body golden. 



Habitat. — Ormond, Fla. (Apr., Mrs. A. T. Slosson). 

 Described from two females in the collection of Prof. C. W. 



