March, 1919.] Dawson: New Species of Serica. 33 



completed. It is hoped, however, that the descriptions and figures of 

 the new species will stimulate an interest in this long neglected genus 

 and ultimately result in a far more complete review than would other- 

 wise have been possible. 



All types, unless otherwise noted, are deposited in the collection 

 of the Department of Entomology, University of Nebraska. 



Serica campestris new species. 



<^. Length, 8.5 mm., width, 4.5 mm. Color very dark mahogany, upper 

 surface bare, polished and shining, without any trace of sericeous or pruinose 

 lusters ; however, the propygidium, basal margins of pygidium, sixth sternite 

 and sides of the preceding sternites, anterior coxse and lower half of anterior 

 femora lightly pruinose. 



Clypeus slightly, or not at all depressed below the level of the front, lateral 

 margins moderately elevated, the anterior margin more suddenly and strongly 

 elevated, moderately sinuate at the middle ; the lateral incisure acute and 

 only moderately strong ; discal area very slightly tumid just below the 

 middle ; evenly and closely punctured, the punctures separated by one half to 

 two thirds their own diameters. Clypeal suture fine but distinct. Front and 

 occipital area less densely and regularly punctured, the punctures contiguous 

 to separated by three times their own diameters. Antennal club about equal 

 to the total length of the antenna beyond the basal constriction of the first 

 segment. Eyes not large, and head relatively broad and short, as is shown 

 by the following measurements :* Diameter of head through eyes 23, distance 

 between inner eye margins, 14; length of head on medial line, 16; extreme 

 width of clypeus in front of incisure, 11. 5; antennal club, 7.7; dorso-ventral 

 diameter of eye, 8.2. 



Pronotum convex, widest through the posterior angles which are bluntly 

 rectangular, and arcuately narrowed to the acute anterior angles ; punctura- 

 tion similar to that of front, but becoming somewhat closer toward the sides. 

 The pronotal measurements are as follows : Width through posterior angles, 

 37; width through anterior angles, 23.5; length on median line, 21. Scu- 

 tellum closely punctured like pronotum, but often a little less densely so on 

 the median line ; though apparently longer than wide, the actual measurements 

 are: Base. 15; length, 15. 



Elytra normally furrowed, the grooves very closely punctured with three 

 rather confused rows of laterally coalescing punctures ; costas with a few ir- 

 regularly placed punctures. Length of elytra, 70 ; greatest width. 45-5°- Body 

 beneath coarsely, not closely punctured, the punctures finer on the abdomen, 

 where they tend to develop into longitudinal wrinkles. Middle of fifth abdom- 



1 The unit of measurement used is one tenth of a millimeter; measure- 

 ments obtained by the translation of micrometer readings. (Use only actual 

 measurements, because the impressions of comparative dimensions are usually 

 inaccurate, often astonishingly so.) 



