288 NORTH AMERICAN TRYPETINA. 



40. T. circinata n. sp. % 9 • — Lutea, alis concoloribus, totis sequa- 

 libus et obtusis, per cireulos fuscos inter se cohaerentes reticulars, 

 adversus marginem praeter dimidium basale nigricantibus, vena longi- 

 tudinali tertia setosa. 



Clay-yellow, wings of tbe same color, of very equal breadth, obtuse at 

 the end, reticulate with small, brown, contiguous circles ; infuscated 

 along the margin, except upon its first half; the third longitudinal vein 

 bristly. Long. corp. % 0.24, $ cum terebra 0.27 ; long. al. 0.26—0.27. 



The resemblance of this species to T. seriata is so striking that 

 one would almost be tempted to take it for a mere variety. How- 

 ever, the picture of the wings, perfectly identical in both sexes, 

 shows such differences from that of T. seriata, as occur in closely 

 allied species, but not in a variety of the same species. While 

 the reticulation of T. seriata consists of small, angular brown 

 spots, arranged in double rows between each pair of longitudinal 

 veins on the middle of the wing, in the present species the spots 

 are replaced by small brown ringlets, mostly closed, but some of 

 them open, and connected with each other. The infuscated por- 

 tion of the anterior margin in T. seriata begins before the end 

 of the auxiliary vein and fills the stigmatical cell entirely, with 

 the exception of a but little perceptible clay-yellow drop at the 

 tip, and a similar, obsolete drop at the basis ; between the ends 

 of the first and second longitudinal veins there are, besides the 

 somewhat hyaline spot immediately beyond the former, only two 

 brownish-yellow drops near the anterior margin. In T. circinata 

 the extreme tip of the auxiliary vein and the spot on the costa 

 corresponding to it are black, but there is no trace of dark color- 

 ing in the costal cell before the tip of the auxiliary vein ; the 

 stigma is rather saturate yellow, and has upon its middle a con- 

 siderable rectangular black spot ; the pale spot which follows 

 immediately upon the tip of the first longitudinal vein is more 

 extensive, but less limpid, and the two drops which lie between 

 it and the second longitudinal vein are much larger and more 

 limpid, so that they entirely interrupt the black border along the 

 anterior margin. A similar interruption is caused by a drop 

 immediately beyond the tip of the second longitudinal vein, which 

 is entirely wanting in Trypeta seriata. By these complete breaks 

 in the black anterior border Trypeta circinata is very easily dis- 

 tinguished from Trypeta seriata, which has only one break of this 

 kind immediately beyond the apex of the first longitudinal vein. 



Hab. New York (Mr. Akhurst). 



