230 Journal New York Entomological Society. t Vo1 - xxvii. 



anterior transverse impression indistinct, median line distinct, abbreviated 

 before and behind ; side margins moderate, edge reflexed. Elytra three times 

 as long as the thorax, twice as long as wide ; sides straight and nearly parallel 

 to the apical third, thence moderately arcuate to apex ; disk with five distinct 



and punctured striae, sixth represented by a row of indistinct punctures ; the 

 second and third curve out at apex and join the incurved portion of the sutural 

 stria, which is strongly marked and parallel to the suture and not hooked ; the 

 second and third striae are indistinct where they join the incurved sutural; 

 eighth stria broadly interrupted at the middle. Two impressed punctures on 

 the third stria. Length, 2.75 mm. ; width, 1 mm. 2 5. 



Rincon Mts., Ariz., 7-07. (Beyer.) 



This species with the form of the group vittiger belongs by its 

 structural characters in the group incurvus (Tachyura Mots., Bary- 

 tachys Chaud.). In Col. Casey's arrangement of Tachyura, it would 

 be placed next to tripunctatus Say from which it is distinguishable by 

 the absence of the three basal thoracic punctures. In Hayward's ar- 

 rangement it would be placed next ferrugineus by its distinctly punc- 

 tured striae. It is distinguishable from ferrugineus by its elongate 

 and depressed form and more numerous striae. 



T. conjugens agrees with the description of T. curvans Bates 

 (Biol. Cent. Am., i (I), p. 143) from Guatemala with the exception 

 of the incurved portion of the sutural stria which in curvans Bates 

 states to be visible only " under a high power of the microscope." In 

 conjugens it is as strong as in any of the North American species of 

 the subgenus Tachyura. Bates also states : " A species very closely 

 resembling this {curvans) but having a rather narrower and more 

 cordate thorax, has been sent to me from California as Tachys n. sp. 

 by Mr. H. K. Morrison." No such species has been described. It 

 may be that conjugens is the one referred to. 



