Vol. VI] VAN DUZEE— SPECIES OF ORTHOTYLUS 89 



Group III (dorsalis group). More elongated or slender spe- 

 cies having the base of the vertex sharply carinate pre- 

 ceded by a distinct bidentate transverse depression; the 

 pronotum nearly or quite as long as broad and the legs 

 long and slender. The species of this group are usually 

 pale, marked more or less with fuscous or black, the elytra 

 typically having the clavus and an area on the disk of the 

 corium fuscous or black. Here belong : formosus, n. sp. ; 

 rnodestiis, n. sp. ; dorsalis Prov. ; marginaius Uhl. ; molli- 

 culus, n. sp. ; af finis, n. sp. ; angulatus Uhl. ; brunneus, n. 

 subsp. ; cnneatiis, n. sp. ; pullatus, n. sp. ; languidus, n. sp, ; 

 lateralis, n. sp. ; cruciatus, n. sp. ; suhmarginatus Say ; 

 necopinus, n. sp. ; fumidus, n. sp. ; ornatus, n. sp. ; can- 

 didatus, n. sp, 



I have been unable to locate inconspicuus Uhl. Renter's 

 description of his biguttatus answers almost perfectly to coagu- 

 lants Uhl. of which it probably is a synonym. Tucker records 

 diaphamis Kirschb. from Kansas, but the determination is very 

 doubtful. The present paper includes all other species recorded 

 from America north of Mexico. The following key will locate 

 our species: 



Ground color green, sometimes almost white, dark markings if present not 

 clouding the elytra 1^ 



Ground color pale testaceous to black, sometimes greenish when imma- 

 ture; the elytra in that case marked with fuscous or black areas 14 



1, Antennas, tibiae and tarsi black ; ground color a bluish-green ; small 



species (3mni. to tip of abdomen), 2. tibialis, n. sp. 



— , Antennas pale or mostly so, 2. 



2, Basal joint of the antennas marked with black, 3. 



— , Basal joint of the antennae uniformly pale, 4. 



3, Antenna; slightly infuscated, the basal joint green or greenish with its 

 immediate base deep black, 1. insignis, n. sp. 



— , Antennae pale; basal joint biannulate with black; base and apex of 

 second joint fuscous; apex of the head deep black.. 13. nigrinasi, n. sp. 



4, Form broader or ovate, somewhat like a small Lygus, 5. 



— , Form more slender and parallel, 6. 



5, Color a yellowish-green, with the membrane infuscated; the surface 

 clothed with deciduous matted fuscous hairs 14. ovatus, n. sp. 



— , Color nearly white; above sparsely dotted with bluish-green in ma- 

 ture examples H. senectus, n. sp. 



6, Membrane black or blackish with the nervures calloused and white at 

 apex ; surface clothed with coarse deciduous black hairs, 



4. znridicatus Uhl. 



— , Membrane sometimes infuscated, the nervures then pale or concolor- 

 ous, 7 



