Records of Bees. 301 
front ; two broad stripes, not very long, on anterior part of 
mesothorax, these completely isolated from the ochreous 
band; axillar teeth short ; mesopleura with dense ochreous 
hair along anterior margin, and a broad band running 
across the middle, below this is a large quadrate black area ; 
tegule black, the margin brownish. Wings dusky hyaline, 
nervures fuscous. Legs coloured as in 7’. cuneatus. Abdo- 
men marked as in T. cuneatus, but apical band on first 
segment rather widely interrupted, and that on second 
sometimes interrupted; segments 3 and 4 with entire 
bands ; fifth with a large ochreous patch on each side of 
the modified area; last ventral segment straight in profile. 
Meadow Valley, Mexico (C. H. T. Townsend). US. 
Nat. Museum. 
Close to JT. cuneatus, but on account of the different 
ornamentation of mesothorax it must be considered distinct. 
The eyes are yellow-green, not bluish green as in typical 
helianthi. Jn helianthi the black lower part of pleura is not 
enclosed by ochreous. 
Triepeolus medusa, sp. 1. 
2 (type).—Length about 11°5 mm. 
Black, of the type of 1’. helianthi; mandibles reddish in 
middle ; clypeus shining, finely punctured, a few indistinct 
large punctures; region of antenne with ochreous hair; 
third antennal joint dark reddish in front ; hair-markings 
of thorax and abdomen pale, faintly yellowish, almost 
greyish ; mesothorax with a narrow band along sides and 
behind, but not in front; disc with two parallel broad 
stripes ; axillar spines small and obscure ; mesuopleura with 
a band across middle, the black region below not enclosed ; 
tegule piceous. Wings’strongly dusky. Legs coloured as 
in 7. cuneatus and concinnus. Abdomen essentially as in 
concinnus, bands on first and second segments interrupted, 
band on second segment with an elongated process directed 
cephalad on each side. Spurs black. 
¢.—Face covered with pure silvery-white hair; meso- 
pleura covered with silvery-white hair; parallel stripes of 
mesothorax less developed; middle femora broadly black 
above; first three abdominal bands interrupted, and the 
fourth with a linear interruption, not quite complete. 
Federal District, Mexico, “7 and 8, 10.” U.S. Nat. 
Museum. 
The specific name was suggested by the black area on 
