OMUS AND ClCINDELA 1 7 



Cincindela Linn. 



In the longilabris group, the species allied to montana, having 

 the upper surface black, are better defined than those allied to 

 longilabris, for they differ among themselves not only quite radically 

 in sculpture but in tarsal characters. The strong dilatation of the 

 first three joints of the anterior male tarsi in this group has been 

 noted many times; this, as well as the elongate labrum, peculiar 

 coarse sculpture and bald front in both sexes, causes it to be sharply 

 defined among the other groups. The black species may be known 

 by the following characters: 



Elytral punctures coarse and close, everywhere either in mutual contact 

 or densely and polygonally crowded 2 



Elytral punctures suturally smaller, rounded and clearly separated by the 

 more shining interspaces, larger and denser laterally; under surface 

 not or barely noticeably metallic at any part; tarsi very slender. .4 



2 Hind tarsi long and very slender, much longer than the tibiae in both 

 sexes; upper surface deep black, dull in lustre, the labrum (cf) 

 entirely pale, or ( 9 ) black, generally pallescent narrowly along the 

 middle and at the basal margin; prothorax transverse, obtrapezoidal, 

 dull, with deep transverse impressions; elytra with a fine faint and 

 feebly bent median band and a slightly pallescent transverse apical 

 streak; abdomen with slight metallic coloration. Length (cf 9 ) 

 13.5-15.0 mm.; width 5.0-5.7 mm. Utah (Provo), Spalding. 



montana Lee. 



Hind tarsi notably short, not longer than the tibiae in either sex 3 



3 Tarsi throughout very slender and filiform; body smaller and more 

 abbreviated than in montana; labrum (cf ) pale throughout, twice 

 as wide as long, the two apical sinuses broad and very feeble, the 

 lateral teeth short and very obtuse, the medial small, acutely 

 angular, or ( 9 ) pale, nubilously black toward the margins but not 

 basally, much less than twice as wide as long, more produced medially, 

 the lateral teeth strong, rather bluntly angular, the medial tooth 

 strong and very acute; prothorax very short and transverse; elytra 

 shorter, the fine and moderately pale median band more strongly 

 angulate than in montana, the apical streak obsolete; abdomen very 

 faintly metallic. Length (cf 9 ) 11.5-12.8 mm.; width 4.5-5.0 mm. 

 Alberta (Calgary), -Griddle canadensis Csy. 



Tarsi very stout, much thicker than in any other species of the genus 

 within our faunal limits; body small, short, the head and prothorax 

 peculiarly reduced, deep black, the elytra greenish-black; labrum 

 (9 ) deep black throughout, twice as wide as long, tridentate; pro- 

 thorax short and very transverse; elytra with the very fine middle 

 band formed as in the preceding but obsolete in the type, excepting 

 a pale point representing its posterior end, the apical streak obsolete; 

 abdomen rather brilliantly metallic green and violet intermingled. 

 Length (9) 1 1. 5 mm.; width 4,5 mm. Manitoba (Aweme), Criddle. 



spissitarsis Csy. 

 T. L. Casey, Mem. Col. V, Oct. 1914. 



