ART. 26 WASPS OP SUBFAMILY PSENINAE MALLOCH 23 



sulcate dorsocentral carina on the abdominal petiole. The carina 

 between the antennae is complete, and the section of the meso- 

 pleura above the episternauli is glossy and without definite sculpture, 

 while the episternauli is well developed. 



Length, 6.5-7.5 mm. 



Type (U.S.N.M. No. 44210), male (no. 2416) ; allotype (no. 2021), 

 and five paratypes, from Canada, without more definite locality 

 (C. F. Baker collection). 



PSEN (MIMUMESA) STRIATUS (Viereck) 



Mimesa striatus Viebeck, Trans. Amer. Ent. Soc, vol. 27, p. 339, 1901. 



This species and the two dealt with subsequent to it in this sub- 

 genus are distinguished from their allies by the presence of longi- 

 tudinal closely placed fine striae on the greater portion of the meso- 

 notum. I have segregated the three upon rather minute charac- 

 ters but believe they are distinct, the present one being accepted as 

 the one described by Viereck because it fits the description better 

 than either of the other two. Viereck, however, apparently had at 

 least one specimen of longicomis before him, as he stated in a 

 paragraph under the description that he had seen a specimen la- 

 beled Florida, which, judging from the description, ought to have 

 been longicomis instead of sfriatus. 



I have seen one damaged female of striatus, from Cape May, N.J., 

 the single male before me being from Chesapeake Beach, Md., July 2, 

 1924 (J. E.Malloch). 



PSEN (MIMUMESA) LONGICORNIS Fox 



Psen longicomis Fox, Trans. Amer. Ent. Soc, vol. 25, p. 8, 1898. 



Psen floridana Rohwer, Proc. Ent. Soc. Washington, vol. 12, p. 102, 1910. 



This species is very similar to striatus as accepted above, differing 

 mainly as indicated in the key. Fox's type was from Florida, and 

 apparently like the type of floridana Rohwer, and a male bearing the 

 name albitarsis Ashmead in the National Museum; all three were 

 taken in that State by Mrs. A. T. Slosson. Ashmead did not ap- 

 parently describe his species, and the female type of -floridana bore 

 also a manuscript name, floridana, by that authority when it was de- 

 scribed by Rohwer. 



I place with the above two three females, from Alexandria, La., 

 May 22, 1908 (F. C. Bishopp) ; 10 miles southwest of Kelso, Iowa, 

 July 30, 1928, and Yemassee, S.C., September 30, 1926, that agree in 

 every respect with the one standing as floridana. 



This is apparently a southern species. 



