244 
Psyche 
[October 
1. HaUctoides dentiventris Nyl. Labial palpi with first joint 
longer than the other three together, second shortest; 
maxillary palpi with first two joints stout, galea reaching 
to about middle of fourth joint, 
2. Dufourea vulgaris Schenck. Labial palpi with first joint 
about as long as 2 +3; maxillary palpi with first three joints 
stout, galea reaching a little beyond middle of third. 
However HaUctoides paradoxus Morawitz (Switzerland) 
has the first joint of labial palpi thickened beyond the middle 
(as in the Californian H. virgatus Ckll), and not nearly so long 
in proportion to second as in H. dentiventris. It has the first 
four joints of maxillary palpi stout, the galea reaching about 
middle of third. 
H. virgatus has the second joint of labial palpi very long, 
nearly as long as first, thus differing conspicuously from H. 
paradoxus. In H. virgatus the mandibles are simple; in H. 
campanulce Ckll., H. tinsleyi Ckll., Dufourea vulgaris ^ etc., and they 
have a conspicuous inner tooth. The labrum of H. campanulce 
is much shorter in proportion to its width than in H. virgatus, 
and also differs in having prominent lateral corners. The general 
outcome of these and other studies is that HaUctoides can be 
taken in a broad sense as including very diverse forms; or it 
can be divided into numerous genera, for which quite a series 
of names is already available. Probably the best method is 
to treat the divisions as subgenera; accordingly H. paradoxus 
may be taken as the type of a new subgenus Cephalictoides, nov., 
most obviously differing from Parahalictoides in the shape of 
the head. For other details see Ann, Mag. Nat. Hist., Dec. 
1899, p. 420. 
