1897.] NATURAL SCIENCES OF PHILADELPHIA. 349 



pes to be conspecific. At all events, I think, one may say, that the 

 $ of scitulus is either pictipes or closely similar to it. 



A 9 from Colorado (Baker l,599=Fort Collins, Aug. 15, 1895, 

 on Solidago canadensis) has the clypeus entirely black. 

 Calliopsis australior n. sp. 



The 9 of this so greatly resembles scitulus in every respect that 

 it was long held to be a variety of it, and 1 only now separate it on 

 observing that the differential characters are constant. The band 

 on the third abdominal segment, usually entire in scitulus, is always 

 interrupted, often quite widely ; the band on the fourth segment is 

 usually entire, being the only entire band ; the fifth segment is black, 

 with neither band nor spots; the lateral face-marks are always much 

 broader and shorter than in scitulus ; the clypeus always has a pale 

 stripe down the middle; otherwise the two insects are about the 

 same. It is to be remarked that australior partakes of the charac- 

 ters of the Californian C. edwardsii, which has the longitudinal 

 clypeal mark but not the hiteral marks on the clypeus, which are 

 common to australior and scitulus. C. edwardsii is also a larger in- 

 sect than scitulus, whereas australior is of the same size. 



The 9 of australior I found in numbers visiting the flowers of 

 Cleome serrulata at Albuquerque, N. M., Aug. 16 ; I also found it 

 on the sand hills at Mesilla, N. M., May 29, numerously visiting the 

 flowers of Dithyrea wislizeni Engelm. It also comes from Colorado, 

 collected by Prof. C. F. Baker (No. l,592=Fort Collins, Aug. 8, 

 1895, on Cleome). 



The Colorado form has the abdominal markings more yellow than 

 that from New Mexico. 



I am uncertain about the $ of australior, but Baker's 1,591 

 (Fort Collins, Aug. 8, 1895, on Solidago canadensis) may belong 

 there. It has the first joint of hind tarsus yellow, not greatly 

 broadened, and with no conspicuous tuft of hairs at the tip. The 

 face is all white below the level of the antennse, except a couple of 

 black dots on clypeus, and one at apex of each dog-ear mark. The 

 postscutellum and a transverse band on the scutellum are white. I 

 took a closely similar $ at El Paso, Texas, May 13, 1897, three 

 specimens. It has the face more narrowed below, and the abdomi- 

 nal markings more reduced than in the Colorado insect. It was 

 flying round Baccharis. 

 Calliopsis personatus n. sp. 



9 . Length 8 mm. This also is a sort of modified scitulus, but 

 the modification is in a different direction. The most obvious char- 



