90 Eighteenth Report State Entomologist of Minnesota — 1920 



Deraeocoris. There is a general similarity between the claspers of 

 all the species and the differences are minute as compared with those 

 found in the other groups of the genus. The right clasper is relatively 

 small, yet careful comparison between the species has shown that 

 slight but constant dift"erences exist. 



1. Dorsum bright red, claviis, a pair of large spots on corium and on 



pronotum black ...... histrio Renter p. 100 



Dorsum not red and lilack as the above ....... 2 



2. Cuneus red or stained with reddish ; membrane hyaline or with only 



a fuscous spot at apex, or a point each side of middle ... 3 

 Cuneus infuscated or with blackish, rarely reddish, but if so then 

 the membrane distinctly blackish ; membrane usually heavily marked 

 with fuscous but if not then the cuneus without a trace of reddish . 5 



3. Segment II of the antennae not equal to length of pronotum ; two fus- 



cous spots on apical half of membrane, darkest specimens developing 

 a brownish cloud distad of the spots . . ornatus n. sp. p. 99 



Segment II of antennae equal at least to length of pronotum, or longer; 

 membrane hyaline or with an oval-shaped fuscous spot at apex . . 4 



4. Membrane infuscated at apex ; cuneus red, calli and scutellum fuscous 



to black .... cuncatus n. n. ( = \\cuncalis Rent.) p. 96 



Membrane hyaline : cuneus, calli and scutellum reddish 



tiuctus n. sp. p. 95 



5. Membrane nearly clear but having two small fuscous points, one at each 



side on the apical half .... ncbulosus Uhler p. 91 

 Membrane either hyaline or with fuscous but not marked as the above 6 



6. Membrane with apical half hyaline or nearly so, not distinctly marked 



with fuscous ; dorsum uniformly black . . bakcri n. sp. p. 102 



Membrane with the apical half infuscated, if not distinctly so then the 

 dorsum more or less pallid gray ....... 7 



7. Dorsum uniformly black, sometimes narrowly pale at base of cm- 



bolium and corium ; disk of pronotum never broadly pale or sordid 



gray at the sides brcvis Uhler p. 103 



Dorsum not uniformly black, more or less sordid or pallid gray and 

 marked with fuscous or black . . . . ■ - . . 8 



8. Frons black, palest forms with a pale spot on median line at vertex 



but never extending upon frons; juga always black; median line of 

 disk pale or at least palely indicated ; distinctly ovate, hemelytra of 

 male short, similar to the female . . nigrifrons n. sp. j). 108 



Frons with median line pale, or at least palely indicated, rarely black 

 but in such case the disk of pronotum black and only the lateral mar- 

 gins pale; juga may be black but in such case the median line of 

 disk is also black; females ovate, hemelytra of males usually distinctly 

 elongate ....-..••••■ 9 



9. Juga black, or slightly brownish in pale forms ; disk of pronotum with 



black color always confluent over the median line .... 



brcz'is piccatHS n. var. p. 105 

 Juga pale, or at least brownish ; pronotum grayish testaceous or with 

 blackish, in the latter case the median line of the disk pale . . 10 



