1903] JOHNSOiY:-ASILIDAE III 



Of this handsome species I have seen only four colonies, all taken in Travis 

 County, Texas. Three of these were in oak logs that had been brought to Austin 

 by the crackers from the mountain canons northwest of the city. The remaining 

 nest was found in Bull Creek Caiion in a crevice between two huge rocks. The 

 males and winged females were taken in two of the nests Feb. 28, 1901, and March 

 25, 1902. 



C. texanus appears to be closely related to C. sayi Emery of Arizona and 

 Mexico. It is sufficiently distinct, however, both in size, coloration, shape of 

 clypeus, petiole, etc. 



April 15, 1903. 



A NEW GENUS AND FOUR NEW SPECIES OF ASILIDAE. 



BY CHARLES W. JOHNSON, BOSTON, MASS. 



Type. — Dasypogoti coruiitus Wiedemann, Auss. Zw. Ins., I, 382, 1828. 



This species has been placed by Baron Osten Sacken in the synonymy under 

 Cerafurgus criuiatus Say. At the time of writing my paper on the Diptera of 

 Florida (Proc. Acad. Nat. Sci. Phila., 1895, p. 303-304) I did not possess examples 

 of Say's species, and as Wiedemann's species agrees quite closely in color-pattern 

 I assumed that the synonymy was correct. Since obtaining specimens of C. 

 cruciatics I was somewhat surprised to find a great difference in the antennae, so 

 much so that D. cornutus cannot remain in the genus Ceraturgus. The antennae 

 are so accurately described by Wiedemann, as to leave no doubt as to the species : 

 *'Erstes Fuhlerglied rothlich, die folgenden schwarz : erstes und zweites von 

 gleicher Lange ; das dritte fast viermal so lang als eines von jenen, an der Spitze 

 ein wenig verdickt ; das erste der beiden Spitzenglieder sehr klein, fast verkehrt 

 kegelformig das letzte zusammengedriickt eirund, noch einmal so lang als das 

 vorhergehende, mit einem sehr kurgen Seitendornchen." 



The terminal joint has a slight lobe-like projection bearing a small spine as 

 shown in Fig. 3. In C. a-uciatus the terminal joint is elongated and densely 

 pubescent (Fig. 2). The rare Ceraturgus auruhntus Fabr., also resembles C. 

 cornutus., but the form of the antennae (Fig. i), hyaline wings, and smaller size 

 readily separates it from that species. I have seen but three specimens of C. 

 aurulentus^ one taken by myself at Westville, N. J., August 21, 1892; the others 



