TWO GENERA OF TRYPETIDAE—MALLOCH ll 
along the fifth vein to its base is unique in this group except in 
the case of the single aberrant female mentioned under stigmatica. 
The mid femur has some rather strong anteroventral bristles beyond 
the middle, as mentioned by Thomson. 
The specimen is but 3 mm. in length; Thomson gives 4 mm. as 
the length of his specimen. 
Original locality, California. 
TRYPANEA RADIFERA (Coquillett) 
1899. Urellia radifera CoquiILtteTt, Journ. New York Ent. Soc., vol. 7, p. 267. 
Male. 
1932. A aie: hebes CurrAN, Amer. Mus. Nov., No. 556, p. 9, fig. 7. (Female.) 
I figure the wing of the male and female (fig. 1, 7, &). 
The male has the frontal bristles much shorter than does the fe- 
male, the ocellars not extending quite to the bases of the upper pair 
of infraorbitals, the mid femur with a number of dark anteroventral 
bristles on the apical half that increase in length as they advance 
toward the apex, and the apical Y-shaped mark on the wing 
undeveloped. 
The female has no strong anteroventral bristles on the mid femur 
and the black apical Y-shaped mark on the wing is entire. There 
are frequently some microscopic setulae from base to near inner 
cross vein on the underside of the third wing vein, and the brown 
mark on the fifth vein near middle of the discal cell is usually more 
elongate in the female than in the male. 
There can be no question of the association of the sexes as I have 
a pair taken in copula by me at Medicine Hat, Alberta. 
Originally described from Tucson, Ariz., and in the National Mu- 
seum collection there are specimens from New Mexico, Colorado, 
Texas, Idaho, South Dakota, and Alberta. 
TRYPANEA MICROSTIGMA Curran 
1932. Trypanea microstigma CuRRAN, Amer. Mus. Noy., No. 556, p. 7, fig. 8. 
(Female. ) 
The male has the black Y-shaped mark at apex of the wing un- 
developed, sometimes represented by black dots at apices of the 
third and fourth veins as in figure 1, 7, while the female has this 
mark usually entire as in figure 1, m. The black stigmal mark is 
larger in the male than in the female, extending entirely across the 
cell. 
In the male there are several rather strong blackish bristles on 
the anterior surface of the mid femur that are as in the other species 
having such bristles almost on the anteroventral surface of apical 
half, and as usual in this section of the genus the frontal bristles 
are much shorter in the male than in the female. 
