1894.) Entomology. 538 
5. With one (American) exception—Cladura—all the exisiting 
genera which are represented in the American tertiaries are genera 
common to the north temperate zone of Europe and America, and are 
generally either confined to these regions or the vast proportion of 
their species are so confined. A similar climate is indicated, but 
this latter conclusion should be received with hesitation, since our 
knowledge of the distribution of American genera is mostly confined to 
the Atlantic States. There are, however, no certain indications of a 
warmer climate, such as have been shown from the study of other 
groups. 
6. There are no extinct groups higher than genera, but one or two 
of these, such as Cyttaromyia and Micrapsis, are of a somewhat strik- 
ing character. 
T. The relative importance of the two subfamilies of Tipulidæ though 
differing on the two continents of Europe and America both in tertiary 
and in recent times, was much the same, on each continent, in tertiary 
times as now; while in the relative preponderance of the different 
tribes of Limnobine, our tertiary fauna shows a somewhat closer agree- 
ment with the European tertiary than with the existing American 
fauna. There are, however, no striking generic alliances pointing in 
the same direction. 
Dr. Packard on Lagoa crispata.—In an important paper pre- 
sented to the American Philosophical Society’ Dr. A.S. Packard gives 
an interesting account of a remarkable moth, accompanied by seven 
plates of figures. The larva in question is remarkable because it pos- 
sesses the rudiments of two pairs of abdominal legs in addition to the 
five pairs usually present in lepidopterous larvæ. In summing up the 
characters which lead him to consider Lagoa a generalized type the 
author says: In the superficial characters of the imago and in having 
in the larva abdominal legs, Lagoa resembles the Liparide, but in all 
its essential characters, those of the egg, larva, pupa and imago, it = 
longs with the Cochliopodidæ, except in the matter of the presence 0 
abdominal legs in the larva. On this account it seens fairly "a to 
_be regarded as the type of an independent group. ek mor = 
regard it as a generalized ancient group of Oone æ, te tee 
it to a subfamily Lagoinæ, or we may boldly remove it altoge ak 
either of the two families mentioned and consider the genus s r 
resentative of a distinct family and designate the group by the E 
3 A Study of the Transformations and Anatomy of Tagos crispata, a Bombycine 
Moth. Proc. Am. Phil. Soc., vol. XXXII, pp. 275-292 
