286 
NORTH AMERICAN MYRMOSIDAE 
and continued onto the stigma; other veins witii a few groups or short rows 
of similar hairs; venation as shown in figure 4. 
Legs honey-yellow, with eonspieuous erect white haii’s, the tibiae bearing 
in addition short jjubescence, and the tarsi dense appressed pubescence, 
amongst which red sjrines are partially concealed; posterior metatarsus nearly 
as long as the remaining segments united, longer than the following three. 
Anterior jjortion of the petiole enlarged, somewhat gibbous posteriorly,, 
the posterior part greatly swollen, subglobose,. 
strongly convex below, but less strongly than 
above (see the text figure), its ventral surface 
without median keel or prominence; the 
petiole and the following segment above and 
below coarsely punctured and clothed with 
sparse, erect, white hairs; the second ventral 
segment with a median longitudinal fossa;: 
remaining segments finely and less roughly 
punctured, their vestiture more dense, on 
the venter gathered most thickly along the apical margins, yellow toward 
the apex of the abdomen. 
This species is most closely allied to helfragei and to nigriceps, 
from which it may be differentiated by the character employed 
in the table. 
From piceiceps Baker and calif ornicus Baker, which fall in this 
section of the genus, and both of which are omitted from the fore- 
going key to species, calexicensis may be distinguished by having 
its posterior ocelli placed distinctly nearer to the compound eyes 
than to each other, while in the two former the reverse is the case.. 
Type . — California: Imperial County, August 11, 1914, 1 cT, 
(the author), [Cornell University, No. 127.1]. 
Chyphotes nubeculus (Cresson), cf. 
Colorado: [Type, American Entomological Society, no. 1889]; Denver, 
(recorded by Melander). New Mexico: Las Cruces, San Marcial and Santa 
Fe (collected by T. D. A. Cockerell and recorded by Melander). 
Chyphotes heathii Melander, cf . 
1903. Chyphotes heathii Melander, Trans. Amer. Ent. Soc., 29:320, cf. PL 
IV, fig. 61, forewing. 
C.\liforma: Pacific Grove, May, 1901. 1 cf, (Dr. Harold Heath), [Type^ 
A. L. Melander]; Claremont (C. F. Baker), [Cornell Universit}']. 
Chyphotes similis. Baker, cf . 
1903. Chyphotes similis Baker, Invertebrata pacifica, 1:116, C'. 
C.\LiFORNi.\ : Claremont. 
Chyphotes alhipes (Cresson), cf. 
1903. Chyphotes nevadensis Baker, Invertebrata pacifica, 1 : 116, cf. 
A careful comparison of the type with the description of C. 
Fig. 1. Petiole of Chyphotes 
calexicensis new species. 
