30 PACKARD, NOTES ON THE 



Mandibles long and narrow, the tips incurved, the dense setae 

 on the inner side converge over the base of the maxillae, which 

 last are well developed, reaching when unrolled, nearly to the 

 posterior trochanter. The three-jointed labial palpi are large 

 and long, ascending, and often reaching beyond the front by the 

 length of the third joint. The joints are nearly equal in length, 

 from the two basal joints depend long scales : those on the third 

 are short and generally fine. 



Thorax but moderately stout, being a little wider than the 

 abdomen. The two prothoracic scales (scutum) large, orbicular 

 and very distinct. Patagia often large and long. Meso-scutum 

 shorter than broad. The large scutellum encroaches upon it, 

 being one-half and sometimes two-thirds as large as the scutum. 

 It is a little longer than broad, very equally produced before 

 and behind, being longitudinally somewhat lozenge shaped. 



Meta-thorax short, scutellum transversly linear, while the 

 scutal pieces are small and narrow, being crowded away on the 

 sides of the thorax. 



Wings long and narrow, and the nervules arise beyond the 

 middle of the wing in nearly every genus, being much shorter 

 than usual, and having their origins very approximate and equi- 

 distant. Primaries nearly three times as long as broad. Costal 

 edge convex near the base and towards the obtusely rounded 

 apex. The outer margin is on the average one-fourth shorter 

 than the internal margin with which it is nearly continuous, the 

 internal angle being obscure. 



Marginal and subcostal nervures at nearly equal distances from 

 each other, subcostal nervules short, their origins approximate, 

 and all arise beyond the middle of the wing. Third generally 

 forked. Fourth either independent, being removed towards the 

 middle of the discal space, or simply branching out from its ner- 

 vure as usual. 



The four median nervules are very short, nearly equal in 

 length ; their origins nearly equidistant, all four being grouped 

 closely together, since the fourth is remarkably short. Sub- 

 median often present, or its place when absent indicated by 

 a well marked fold. Internal long, terminating near the end 

 of the fourth median. 



Secondaries long, narrow, and acute, rarely short and 

 obtuse. Costa long, inner margin one-half as long as the outer. 

 Nervules generally short and very equal in length. Discal 

 space divided by a well marked curve ; discal nervules directed 



