146 THE ENTOMOLOGIST. 



edge of the clypeus, absence of black hairs on thorax, and 

 generally lighter colour. The type specimen was taken at 

 flowers of Grindelia squarrosa by Mr. F. C. Bishopp. 



Melissodes mysops, n. sp. 



(? . Length nearly 14 mm., pubescence dull white, some black on 

 scutellum, and black on the basal parts of the abdominal segments 

 except the first; clypeus lemon-yellow, its upper margin black; labrum 

 black ; mandibles without a yellow spot ; flagellum red beneath. Very 

 close to M. cnici, Rob., from which it differs thus: yellow of clypeus 

 only obscurely trilobed ; face broader ; eyes (when dry) pale bluish- 

 grey ; antennre darker ; ventral hair of thorax not black ; scutellum 

 with black hair in middle ; hair of legs not black ; disc of mesothorax 

 and scutellum more shining, the punctures more separated ; abdomen 

 narrower and longer, with weak light hair-bands, failing in the middle; 

 lateral subapical teeth longer and narrower. 



2 . Length about 14 mm. ; face broad, facial quadrangle much 

 broader than long; eyes light grey ; flagellum stained with red beneath; 

 hind part of mesothorax, and scutellum, shining, with well-separated 

 punctures, and sparsely clothed with erect black hair ; pubescence of 

 legs black, but scopa on outer side of hind tibife and base of tarsi long, 

 strongly plumose, and light reddish, in striking contrast ; hair on 

 under side of abdomen and lower part of pleura black, that at apex of 

 abdomen dark fuscous or black. Differs from il/. cnici, Rob., by the 

 conspicuous black hair on disc of thorax, the more shining and less 

 closely and coarsely punctured scutellum, and the narrower abdomen, 

 with distinct pale hair-bands, especially on the third and fourth 

 segments. 



Hub. Maybell, Colorado (type locality), Aug. 1st, 1904, both 

 sexes; Virginia Dale, Colorado, Aug. 2nd, 1903, two females. 

 M. cjiici is an oligotropic visitor of thistles ; the pollen collected 

 by the present species at Maybell looks like thistle-pollen. My 

 M. cnici, used for comparison, are Nebraska specimens received 

 from Mr. J. C. Crawford. In dry specimens the eyes of M. 

 7nijsops are light grey in both sexes ; in M. cnici they are light 

 reddish ; in M. dentivcntris (female) they are light green. 



Since writing the above I have ascertained that the Maybell 

 material was collected by Mr. S. A. Johnson at flowers of thistle, 

 while the Virginia Dale specimens were collected by Mr. F. C. 

 Bishopp at flowers of white thistle. 



Synhalonia terkitella, n. sp. 

 <y . Length slightly less than 10 mm, ; black, the head, thorax, 

 base of abdomen, and legs with abundant long erect greyish-white 

 hair, not at all fulvous, even on mesothorax ; eyes (dry) dark plumbe- 

 ous ; facial quadrangle about square ; clypeus lemon-yellow, without 

 any black border above, but with the usual narrow brown anterior 

 edge ; antennre long, entirely black, third joint comparatively long, 

 considerably over twice length of second ; labrum light yellow, with 

 the lateral margins black ; mandibles black ; last joint of maxillary 



