Genus Pyretophorus. . (eo 
PYRETOPHORUS (?) MERUS. Do6nitz. 
Anopheles merus. Dénitz. 
(Beit. z. Kennt. d. Anop., p. 77.) 
The following is Dénitz’s description :— 
“* Diagnosis—The two upper forks spring up at fairly even heights, 
the lower, however, a little earlier than the upper. 
Four large dark spots on the anterior margin of the wings. 
On vein 6 the root spot lies under the spot of the fifth vein. 
Vein 3 is light, only beset with dark spotlets at its commencement 
and termination. , 
; Vein 4 is dark, only the region of the transverse vein being light. 
Vein 5 is light; only has root and marginal spot; its superior branch 
dark to the middle with two light spots. 
Vein 6 with three spots. . 
Palpi white at the joints, terminal joint quite white. 
Tarsi with narrow white rings. Description after specimens from 
Dar es Salaam :— 
?. This specimen, in regard to the wing marking, has a superficia. 
similarity to A. pharoénsis, is, however, somewhat smaller and is easily 
differentiated by the position of the root spot of the fifth vein just over 
the first spot of the sixth vein, as also by the absence of dark spots in 
front of the forking of the second and fifth vein. The anterior margin of 
the wings has essentially the same marking, namely, the four typical 
marginal spots, besides two small root spots, of which, however, the second 
is not so strongly developed as in that species. The light interstitial space 

Fig, 50. 
Wing of Pyretophorus (2) merus. @. 
After Dénitz. 
between the third and fourth spots is a little longer because the ascending 
dark spot is somewhat shorter than in A. pharoénsis. On the upper 
branch of the upper fork the first. spot is much smaller, the spot in the 
centre of the lower fork-cell somewhat longer than the former. The 
third vein is light, and besides the marginal spot has only two small spots 
before and behind the transverse veins. ‘The fourth vein is dark through- 
out its entire course, only lightened up somewhat in the region of the 
transverse vein; the fork-cell itself is light, and there follows on the 
