MCNEILL REVISION OF THE TRUXALINiE OF NORTH AMERICA, 245 



SPECIES OF UNCERTAIN VALUE AND POSITION. 



Stenobothrus mexicanus, Walk., 1870. Cat. Derm. Salt., IV, 756 

 (Oajac'a). 



Stenobolhrus decisus. Walk., 1870. Cat. Derm. Salt., IV, 757 (San 

 Domingo). 



Stenobothrus arctafus, Walk., 1S70. Cat. Derm. Salt., IV, 761 (Hon- 

 duras). 



Stenobothrus viridissiinus. Walk., 1870. Cat. Derm. Salt., IV, 761 

 (Honduras). 



These species apparently belong to Orphula, but the descriptions 

 are not good enough to enable one to certainly recognize such vari- 

 able and closely-allied forms. It is not. unlikely that mexicanus arc- 

 tatus, and viridissimus are synonyms of O. tepanicus, Sauss., while 

 decisus is possibly O speciosus. 



XVIII. ALPHA, Brunner. Fig. 18. 



Head about as long as the pronotum. Vertex almost horizontal, 

 slightly declivent, sulcate with rather heavy lateral carinae which meet 

 in a blunt point and with no trace of a median carina. The lateral 

 foveolse are present but often not clearly separated from the front oil 

 account of the obsolescence of the lower carincC. The frontal costa is 

 narrow above the ocelkis, sulcate and slightly acuminate below; its 

 sides are more or less strongly divergent, while its lateral carinse are 

 heavy and distinct. The face seen from the side is strongly oblique and 

 straight. The antennae aie somewhat (female) or much (male) longer 

 than the head and pronotum. They are flattened basally and plainly 

 acuminate. The disk of the pronotum is somewhat convex, with the 

 median carina rather slight and cut by the distinct principal sulcus 

 behind the middle. The lateral carinae are scarcely distinguishable, 

 even on the metazone, but. they are replaced on the sides of the disk 

 by distinct light-colored stripes which are strongly or very strongly 

 sinuate, and divergent' on the metazone. The metazone has its poste- 

 rior margin gently rounded. The lateral lobes of the pronotum are 

 small, a little longer than high,, with the anterior margin moderately 

 oblique, the posterior sub-perpendicular and the lower nearly straight 

 and horizontal. The lobes of the mesosternum are separated by a 

 space much broader than long, snd the metasternal lobes by a space 

 about square (female) or longer than broad (male). The tegmina and 



[Proc. D.A.N. S, VoL VL] 31 [January 3, 1897 ] 



