Sept.-Dec. 1921.] D.wvsox : New Species OF Serica. 1G5 



Mesostcrniim and posterior coxal plates strongly and coarsely punctured, 

 more closely so toward the sides where the punctures are separated by only 

 half their own diameter. Punctures of abdominal stcrnites distinctly smaller, 

 half to two thirds the size of those on the posterior coxal plates, and separated 

 by nearly twice their own diameter. The single rows of ambulatorial seta: 

 short and inconspicuous, born by only moderately coarse punctures. Fourth 

 sternite with a more or less well-defined, median, longitudinal impression, with 

 the adjacent punctures often tending to develop into longitudinal wrinkles. 

 Last sternite and margins of pygidium opaque and faintly iridescent. 



Length of genital annature of male (PI. XII), 3 mm. ,\ very character- 

 istic position of the claspers shows the shorter one more strongly flexed down- 

 ward than the longer one. 



$. DilTers from the male by having distinctly smaller eyes (8.2 instead 

 of 10), shorter antennal club (8 instead of 9.4) and the fourth abdominal 

 sternite unmodified. 



Type : <^. Lincoln, Nebraska. 



Allotype: $. South Bend, Nebraska, May 5, 1918 (R. W. Dawson), on 

 boxelder. 



Paratypes: 8 c^, 9 $. 



Nebraska: Lincoln, 3 c?, 6 $ ; West Point, i $. 

 .Alabania : Mobile, 4 d*- ' 9 : Grand Bay, i c?. i $. 



Tlie form here cle.«;cril)ed dift'er.s from rcspcrtiiui principally in 

 the form of tlie clypeus, which in that species is stron,c:ly, trans- 

 ver.^ely rid.s^ed or folded, or as the orgiiial description says: "in 

 medio disci trans^'crsim cicvato-siib-carinatus." The transverse ridge 

 is very densely pinictured. However, these very striking and positive 

 characters vary in intensity and seem to he evanescent, especially in 

 tlie southern and western parts of the range of vcspcrtina. Since 

 the genital armatures of vcspcrtina and accola are indistinguishable 

 it seems hcst to regard accola as a geographical race or subspecies 

 of Z'cspcrtina. 



Serica egregia new species. 



c^. Length S mm., width 4.2 mm. Color chestnut, surface opaque, slightly 

 ^L-riceous, probably distinctly so on fresh specimens. 



Clypeus feebly and indistinctly tumid beyond the middle of the discal 

 area, anterior margin moderately rcflexed, lateral margins less strongly ele- 

 vated, especially toward the clypeal suture; viewed vertically, the anterior 

 margin broadly and distinctly arcuate at the middle, with the corners less 

 broadly rounded than in iiiixlu ; viewed at an angle from above, the margin 

 appears slightly bisinuafe because of the rather prominent rounded corners: 

 lateral incisure entirely obliterated; clypeus densely, evenly and findy punc- 



