66 
Psyche 
[June-Sept. 
in detail. In Jamaica I looked carefully for the family in 
several rivers and mountain brooks on the south slope of 
the main range of the Blue Mountains, in the Hope River 
near Kingston, and in several small, clear, rapid rivers near 
Ocho Rios on the north coast, but did not find a single spe- 
cimen, although Dryopidse are known from the island. I vis- 
ited also the Rio Cobre above Spanishtown, which looked 
like good dryopid water but was too flooded for collecting. 
In Haiti I worked carefully in the river at Ennery and the 
brooks on Mt. Basil (northern Haiti) , in the Riviere Cul 
de Sac and the Riviere Froide (near Port-au-Prince), and 
in various mountain brooks in the high Massif de la Selle 
(southeastern Haiti) up to over 6,000 ft. in the Riviere 
Blanche on the La Selle plateau, with equally little result. 
However, in the La Hotte region (southwestern Haiti) I 
found Dryopidse in every river and brook examined, from 
the Ravine du Sud at Camp Perrin, under 1,000 ft., to a 
small brook at Desbarriere, just north of Mt. La Hotte, at 
about 4,000 ft., the highest running water I saw in the La 
Hotte region. Five genera and eight species of stream lov- 
ing Dryopidse were found in this region. Possibly extensive 
clearing of forests, resulting in heavy freshets, has elimi- 
nated the insects in places by tearing up the stream beds 
and destroying aquatic vegetation, while they survive 
where, as near La Hotte, the forest is mostly uncut or where 
conditions are favorable for some other reason. 
The proportions given in my descriptions have been deter- 
mined by actual measurements. The types of all new species 
are in the Museum of Comparative Zoology. I am much 
indebted to Mr. K. G. Blair for notes on some types in the 
British Museum. 
Subfamily Psepheninse 
Psephenus Hald 
Although this genus is not known from the West Indies, 
an understanding of its secondary sexual characters is im- 
portant in dealing with its West Indian relatives. In 
Psephenus lecontei Lee. the $ differs from the $ as fol- 
lows: average size smaller; prothorax less explanate at 
sides; pronotum less opaque; elytra slightly less distinctly 
