304 THE CANADIAN ENTOMOLOGIST. 



the posterior margin of each segment. Legs flavous, tarsi somewhat 

 darker, front tibise slightly darker. Wings almost clear, with a very 

 slight smoky tinge, wholly without spots, markings, or infuscations of 

 cross-veins ; halteres rufous yellow. 



Length of body (including antennae and with abdomen flexed), 3 mm.; 

 of wing, 3^ mm. 



Described from one specimen taken on foliage May 5, Las Cruces, 

 New Mexico. 



PRELIMINARY REMARKS ON SOME NORTH AMERICAN 

 SPECIES OF HALISIDOTA HUBN. 



BY HARRISON G. DYAR, ROXBURY, MASS. 



Mr. Neumoegen and myself are at work upon this genus, with a view to 

 present a revision of it ; there are, however, some points upon which I 

 should like to make a few independent remarks. The genus Halisidota 

 is exclusively American, its stronghold being in the South. Indeed, the 

 whole sub-family, the Phsegopterin^e, are strongly American, there being 

 no European species and but few African, while still fewer reach through 

 the East Indies to Australia. 



Halisidota (Lophocampa) maculata, Harris. 



race angiiiifera, Walker. 



race agassizii, Packard. 



This species, H. maculata, presents three well-marked local races. 

 The first named form is well known both in imago and larva, and extends 

 in its range as far west as the Rocky Mountains. In the Sierra Nevada, 

 the Cascade range, and throughout Western Oregon, Washington and 

 British Columbia, its place is taken by the race anguiifera, Walk. { = alfii, 

 Hy. Edw.) This race does not differ in the markings of the imago, and 

 I do not think Western specimens can be distinguished from Eastern ; 

 but the larva is strikingly different. Mr. Hy. Edwards has described the 

 most divergent form, * and this is found in the Sierra Nevada of California, 

 and also, I believe, in Southern Oregon. But further to the North, the 

 larvffi assume the black dorsal tufts of the typical form, though I have not 

 seen any that could not be readily distinguished from maculata. It 

 would be very instructive to trace maculata to the ^Vest, and anguiifera 

 to the East through Canada, to see whether the larva strictly intergrade. 



In the coast region of California, that distinct climatic area which has so 

 many endemic species, anguiifera is replaced by the race agassizii, Pack. 

 * Proc. Cal. Acad. Sci. vii. 129. 



