136 :O. Kröber: 
Hinterleib schlank gestielt, schwarz, durch Bestäubung matt. 
Erster Ring gelb bestäubt; zweiter und Basis des dritten hell 
rostrot, an der Grenze beider eine durchscheinende, hellgelbe 
Querbinde; zweiter ‚obenauf etwas verdunkelt. Analsegment rot- 
braun, gleich dem vorhergehenden Ring dicht goldgelb bestäubt. 
Flügel hyalin. Die Binde sehr dunkelbraun, durch die verhältnis- 
mäßig blassen Adern eigentümlich streifig erscheinend, scharf 
begrenzt durch die dritte Längsader und die vena spuria. Fünfte 
Längsader braun gesäumt. Erste Hinterrandzelle mit hellem 
Spitzenfleck. Länge 13—14,5 mm. 
Südarizona, VIII. 
Q: Gleicht dem 3. Hinterleib am dritten bis siebenten re 
oben fast ganz blaßgelb bestäubt, seitlich schwarzbraun mit rost- 
brauner Fleckung. Theca ziemlich lang und stark, schwarz, glän- 
zend, mit brauner Bestäubung, unterseits mattschwarz. Länge 
11 mm. 
Arizona, außerdem bekannt von Texas, Mass., N. J. 
‚18. Conops fronto Will. 
d@: „Length 11,5—13 mm. Face, cheeks, and front uniformly 
light yellow, a minute spot, immediately above the base of the 
antennae, black; face with a silvery luster, extending narrowly 
along the orbits of the front. Antennae blackish, with a reddish 
cast, the first joint yellowish-red; first joint about two-fifths the 
length of the second, the third very distinctly shorter than the 
second; attenuated portion of the style short, the second joint 
considerably projecting. Eyes with a noticeable triangular smooth 
space behind above the middle. Occiput reddish yellow, the upper 
part and the vertex more obviously reddish, pollen light yellow 
varying in different reflections. Proboscis about once and a half 
the length of the head, black, with a deep reddish cast, base swollen. 
Thorax light red, dorsum with a white reflection in certain lights, 
with three broad more or less coalescent black stripes, the middle 
oneabbreviated posteriorly, the lateral ones both infront and behind; 
disk of the metanotum and the metasterna black, dust of the humeri 
and the vertical stripe of the pleurae indistinct; dust of the meta- 
thorax behind light grayish yellowish. Abdomen slender in both 
sexes; red, the disks of the third and fourth segments more or less 
black; posterior margin of the second segment and the anterior 
part of the third yellow; third segment with a narrow posterior 
band, fourth with a broad one, evanescent anteriorly, and the 
remainder of the dorsum, thickly golden yellow pollinose; process 
of the fifth segment below of the female of moderate size. Legs 
red, base of all the tibiae yellow, tip of the hind tibiae and all the 
tarsi black, pulvilli and'the claws, except their tip light yellow, 
coxae and outer side of the four front tibiae with light golden 
luster.. Wings with a brown cloud, reaching to the extremity of 
the submarginalcell; costal cell and a streak running over thefourth 
