40 
Psyche 
[April 
2 is represented by a stump so close to the 1st that it would 
coalesce with it if produced upward. In a specimen of Phor 
integer this cell is petiolate. Of 130 specimens of Parandrena 
andrenoides , which is regularly 2-celled, two show on one side a 
narrow 2nd cubital cell closed at the top. 
Long and short-tongued nest-makers. — Of 216 cases, a trans- 
verse cubital vein is obliterated in 215 short-tongued and only 
one long-tongued, showing that the reduction occurs in the small 
wings where they are less important elements of strength. 
Long and short-tongued inquilines. — While only one long- 
tongued nest-maker has the veins reduced, 59 long-tongued in- 
quilines have one of them obliterated. On the theory of strength, 
this may be explained on the ground that strong wings are less 
important to inquilines. Most inquilines are long-tongued. In 
the short-tongued Sphecodini, I find 13 specimens with one vein 
obliterated. 
Transverse cubital 2 obliterated. — Since the first cubital cell 
is the longest in all of the 226 cases observed, this vein is the one 
which can be dispensed with without weakening. Usually ob- 
literation of vein 2 leaves two cells of the same size. Vein 2 is 
obliterated in 226 cases and 1 in only 60. The 226 cases are 
Andrenidae 169, Halictidae (ex. Sphecodini) 33, Epeolidae 11, 
Nomadidae 6, Sphecodini 3, Colletidae 3, Euceridae 1. 
Transverse cubital 1 obliterated. — Except that it makes the 
first cell a little larger, it can be dispensed with in second order. 
It is wanting in 60 cases, while tr. cu. 2 is wanting in 226. The 
60 cases are Nomadidae 40, Sphecodini 10, Halictidae (ex. Sphe- 
codini) 7, Epeolidae 2, Andrenidae 1. The obliteration in Noma- 
didae and Sphecodini is peculiar. This, I think, is the vein 
wanting in Prosopis. 
Other veins obliterated. — Transverse cubital 3 is obliterated 
in 3 cases, 1st recurrent in 1 and 2nd recurrent in 1. Altogether 
the transverse cubitals 1 and 2 are obliterated in 286 cases, while 
more useful veins are wanting in 5. 
Curiosities. — In Trachandrena claytonice and Dialonia anten- 
narice tr. cu. 2 is wanting on 1 side, tr. cu. 1 on the other. In two 
cases, Oxystoglossa confusa and Heminomada obliterata, both are 
