Vol. VI] VAN DUZEE— SPECIES OF ORTHOTYLUS 91 



— , Elytra with more than the costal and commissural nervures pale ; length 

 under 6nim., 19. 



19, Costal nervure black with a pale vitta between it and the dark dorsal 

 vitta, or it may be dark on the dark areas without a pale vitta in- 

 terior to it, 31. 



— , Costal nervure pale and forming part of a pale costal vitta, 20. 



20, Disk of the pronotum pale with the lateral margins covered by a linear 

 black vitta, the pale disk narrowing anteriorly, 29. 



— , Disk of the pronotum sometimes with a broad pale median vitta, but 

 then with the humeral angles and usually the sides pale, 21. 



21, Pronotum with the anterior lobe infuscated, the posterior lobe more 

 or less distinctly pale, usually divided by a dark median vitta, 30. 



— , Pronotum with the anterior lobe usually pale, never infuscated with 

 the disk of the posterior lobe pale, 22. 



22, Membrane vittate, more or less hyaline with a darker ray beyond the 

 areole, 23. 



— , Membrane uniformly infuscated, without a darker ray beyond the are- 

 ole, 24. 



23, Areole of the membrane hyaline, the vitta beyond the areole evident; 

 color of body clear pale green with a line on the hind margin of the 

 pronotum and a spot behind the callosities black ; a vitta on the clavus 



and spot near the inner angle of the corium fuscous, 



17. formosus, n. sp. 



— , Areole of the membrane more deeply infuscated than the adjoining 

 surface, body more or less infuscated, the base of the corium, the 



cuneus and usually the median line of the pronotum pale, 



30. ornatus, n. sp. 



24, Nearly the whole surface including the legs black or blackish, the 



costal margin, ventral vitta, coxae and trochanters only pale, 



26. pullatus, n. sp. 



— , The legs, at least, pale or but little infuscated, 25. 



25, Callosities pale or they are the last portion of the pronotum to become 

 invaded with black ; vertex often black, when pale without a trans- 

 verse black mark on either side, 26. 



— , Callosities black or they are the first part of the pronotum to become 

 invaded with black; vertex pale with a transverse black mark on 

 either side, 28. 



26, Antennae black in both sexes ; genital hooks of the male pale ; the male 

 generally with a pale dorsal vitta on the pronotum, 20. marginatus Uhl. 



— , Antennae pale in the female, fuscous or black in the male ; genital 

 hooks of the male black, 27. 



27, Pronotal markings transverse ; when the pronotum is all black the 

 second antenna! joint of the male is rufo-testaceous, 18. modcstus,n. sp. 



— , Pronotal markings longitudinal ; when the pronotum is all black the 

 second antennal joint of the male is black, 19. dorsalis Prov. 



28, Smaller (Smm.) ; body beneath mostly black; front black or mostly 

 so, ^ 21. mo Hi cuius, n. sp. 



— , Larger (6mm.); body beneath mostly pale; front pale with a black 

 arc either side, 22. af finis, n. sp. 



29, Smaller (4mm.) ; second antennal joint short, not longer than the third 



and fourth together, 28. lateralis, n. sp. 



— , Larger (Smm.) ; second antennal joint long, distinctly longer than the 

 third and fourth together, 27. cruciatus, n. sp. 



30, Sutural margin of the corium with a wedge-shaped pale mark, 



23. anguiatus Uhl. 



— , Sutural margin of the corium with a linear pale mark, 



24. anguiatus brunneus, n. subsp. 



