OF THE TABAXID.E OF THE UNITED STATES. 427 



that, whenever a species possesses that tubercle, it must be looked for among those with 

 pubescent eyes, even when the pubescence is not apparent. Hitherto I have found only 

 four North American species which have pubescent eyes and no ocelUcjcrous tubercle. 

 Two of them {T bi color and fulcescens) at the same time have no frontal callosity, and for 

 this reason cannot be easily mistaken. The two others are T. Jieinwardtii and T. cerastes, 

 and for both a double reference has )>een introduced, so that the right names will be found, 

 even if the pu1)escence of the eyes should he overlooked. The same precaution of a double 

 reference will be found for T. rliomblcus, whose ocellar tubercle is indistinct. 



2. Of T. Mecjerlei I have a single damaged specimen ; I place this species hypotheti- 

 cally among those with glabrous eyes, and, consequently, without ocellar tubercle. 



3. The table has been constructed principally for female specimens. Male specimens 

 also can be determined by it, but with a certain caution, as the abdominal markings, which 

 were used a great deal for the discrimination of the species, are generally less well defined 

 in that sex than in the females. 



4. I need hardly add that the table will be found useful for determining normally col- 

 ored and tolerably well preserved specimens, and not for very aberrant or ill-used ones. 



AN.A.LTTICAL TABLE OF THE SPECIES. 



pEyes gl:ibi'oiis; ocelligerous tiiberfle iibsent 2. 



1. -j Eyes pubescent ; Ofi'lligerons tubercle iibsont 38. 



L Eyes pubescent ; ocelligerous tubercle })resent (subgenus Tkerioplectes) 41. 



fAlxlouien wilb definite white markiuLTs ' (iiltosrether white in No. 18') 3. 



* 1 Abdomen without any definite white markings 28. 



'The white markings of the abdomen consist in a single longitudinal row of white triangles. . . 4. 



J The white markings, etc., consist of two or three rows of white tiiangles or spots 16. 



The white markings, etc., consist in a distinct white or yellowish longitudinal strij)e, running from the 

 l_ scutelhnn to the end of the sixth segment 24. 



Wings distinctly spotted or clouded with brown (spots sometimes faint only in No. 5) ; antennre mii- 



formly ie<l 5. 



Wings distinctly s]i()tted or chiuded with brown ; tliiril antennal joint reil, but its attenuated portion 



4. ^ black or brown 9. 



Wings with more or less fiint clouds on the crossveins and the bifurcation of third vein ; prevailing 



color of the antennae black or brown 11. 



Wings witliout any vestiges of clouds on the crossveins and on the bifurcation of the third vein . 13. 

 Longitudinal veins of the wings broadly clouded with brown ; frontal callous much longer than broad, 



5. ■{ brownish red ; first posterior cell broadly ojien 1. turbidus Wied. 



[Crossveins and bifurcation of the tliird vein alone clouded with brown 6. 



„ J Prevailing color of the front femora dark brown 7. 



[ Fi'ont femora altogether red 8. 



_ J Front tibiae brown at tip 2. fronto n. sp. 



* [Front tibiae altogether red 3. triligatus Walk. 



■ Brown spots on wings large and conspicuous; third antennal joint almost crescent-shaped, its upper 



angle being dr.iwn out in a long point 4. fuscopunctatus Macq. 



Brown spots on wings but little conspicuous; thii'd antennal joint not crescent-shaped; abdomen co- 

 arctate posteriorly; abdominal triangles long and narrow 5. catenatus Walk. 



^I call definite viarkinr/x the triangular spots, or oblique and not the ivliitish or yellow coloring of the hind or lateral 

 lateral spots, or the dorsal line, which occur in some species, margins of the segments. 



