44 BULLETIN 48, UNITED STATES NATIONAL MUSEUM. 



Expanse of wiiiiis, 25 to 30miii, = l to 1.1*0 inches. 



Hauita'I'. — Nortlieiu, Micldlejaiid Cciitial iStates, south to Alabama; 

 Kew York, 'Tuly to September; Delaware in -July. 



The antenna' are longer and more slender than in the species imme- 

 diately i)receding, and more as in Z. Uvvigata and Z. pedlpllnlix; the 

 lateral bristles longer and more slender. The bend at the basal third 

 is well marked, and two joints are furnished with i)rocesses whicli are 

 curved and ])ointed at tip. The tuftings of the fore legs are prominent. 

 The coxa has a pencil of hair-like scales attached near base. The 

 trochanter is one third as long as the femur. The femur lias a tuft oi' 

 elongated black scales at base and a pencil of yellow, hair-like scales 

 attached at tip and capable of fanlike expansion. The tibial process 

 is large, and the scaly clothing is dense, forming no distinct pencils. 



Zaiiclognatha ochreipennis, Orote. 



187-. Grote, Trans. Am. Eiitonioloiiicnl Soc. IV, 98, JJerminia. 

 187:'.. (Jrote, r.nll. IJnti'. Soc. Nat. Sci., I, W.^, Za>irh,<inatha. 



Ground color luteous with dense, coarse, ocherous powderings. Head 

 and thorax concolorous. Primari(\s with the median lines brown, 

 usually well marked and broad. Transverse anterior line outwardly 

 convex as a whole, with variably marked ontcurves in the intersi)aces- 

 Transverse posterior line irregularly bisinuate. outwardly denticulate 

 on the veins. Subterminal line rigid, pale, usually prominent, generally 

 defined by a preceding brown shade lino, which occasionally forms the 

 more obvious portion of the line. A series of black terminal lunules or 

 dots on the veins. Secondaries pale luteous gray to smoky, with a 

 variably defined, sometimes quite distinct, extra-median dark line, and 

 a distinct, sometimes iiromiuent, pale subterminal line, which is often 

 preceded and defined by a darker shading. A black or brown, inter 

 rupted, terminal line. Beneath, paler, coarsely powdered, all wings 

 with a discal spot, a dark extra-median and jtale subterminal line, the 

 latter sometimes preceded by a darker shade line. 



Expanse of wings, 27 to 32mni=:1.10 to 1.30 inches. 



Habitat. — Canada to Virginia; Central States; Colorado. Canada 

 in July; New York, July to Sei)tember; Illinois, July and August; 

 District of Columbia in August. 



This species and Z. mareidilinca are very unsatisfactorily distin- 

 guished; yet they seem to be good species. Such. ditterences as exist 

 are comi)arative, and are obvious oidy in fairly good specimens, becom- 

 ing more or less lost when they are rubbed. As a whole, Z. marcidilincu 

 averages smaller, is nuich.more even in color, with less tendency to 

 ocherous; the median lines are decidedly narrower and much less dis- 

 tinct, tending even to obsolescence, ]>articularly in the transverse 

 posterior line; and the subterminal line is rarely defined by a darker 

 shade line. Z. ochreipomis is coarsely jxnvdered as a rule, of a brighter, 

 more intense groniul color, varying to a much darker shade; (piite 

 usually becoming daiker terminally and rebevmg the more i)roniinent 



