48 STUDIES IN AMERICAN EPHYDRIDAE (dIPTERA) 
spine short; third joint ovate; arista with eight hairs. Abdomen broad; 
segment four much longer than three; five much shorter; genital segment 
well developed. Legs sparsely bristled, with a suggestion of a fourth extensor 
bristle on middle tibiae. Wings long; second costal section two or three times 
as long as third. Length. — 3.5 to 4 mm. 
9 . Similar, but only three extensors on middle tibiae. 
Holotype . — cf ; San Diego de los Banos, Cuba, [U. S. N. M. 
No. 20725]. Paratype . — 9; topotypical. 
Agrolinma new subgenus 
This subgenus is proposed for the reception of those species 
having the facial bristles hair-like, in series extending well above 
the middle of the facial profile, and the middle tibiae furnished 
with four extensor bristles, i. e., the preapical extensor present 
and well developed. The species falling here, at least those 
known to the author, also have the palpi and antennae generally 
black; middle femora and tibiae never ciliate. The abdominal 
markings are generally in the form of bands which are sometimes 
dilated medianly, or, may be limited to two median series of 
triangular spots. However, the bands do not break up into 
four spots as is often the case with the species of the previous 
subgenus. 
The present subgenus contains several well defined groups 
which I think should be recognized. The type species of this 
subgenus is Notiphila scalaris Loew. 
The scalaris-group 
It is very probable that the European uliginosa Haliday, will 
come within this group, in which case the group name, if 
thought desirable, can be changed to conform. I have not seen 
that species, but the fact that it possesses the tibial character 
of four extensors at once includes it within this subgenus. It 
contains a larger number of forms than either of the other two 
groups. The species as included here are in some cases un- 
satisfactorily separated, and perhaps a few of them may prove 
to be synonyms. 
The characteristics of this group may be considered negatively. 
The abdomen of the male is normal, not armed apically; frons 
and mesonotum not vittate. In other words it is the residual 
group of this subgenus and may ultimately prove to be complex. 
