132 Journal New York Entomological Society, [Voi. ix. 



From what we know of the genus Myochroits, in Mexico and to 

 the southward, we may with more data be able to trace denticol/is back 

 to its southern home. According to Mr. Martin Jacoby,* M. inelan- 

 cholicus, a species very closely allied to denticolUs, occurs at Durango, 

 Pueblo and Tabasco, in Mexico, and also in Panama, thus already im- 

 plying a possible origin of the latter species. M. femoralis, also 

 closely allied to deuticollis, occurs in British Honduras, which rather 

 strengthens this theory. Other species of the genus inhabiting the 

 country to the southward of the United States, are salhei, albovillosus 

 and carifiafics, from Mexico, and tibialis, from British Honduras and 



Guatemala. 



EXPLANATION OF PLATE VIL 



Fig. I. Myochroits denticolUs, dorsal view. 

 Fig. 2. " " lateral view. 



Fig. 3. Corn plant showing ravages of Myochroits denticolUs. 



EXPLANATION OF PLATE VIII. 

 Fig. I. General effect of attacks oi M. denticolUs. 



Fig. 2. Corner of same field where the plants from second planting were not de- 

 stroyed. 



EXPLANATION OF PLATE IX. 



Map showing distribution of Myochroits denticolUs, M. sqiiamosus and M. 

 lons^ulus. 



ON SOME BEES OF THE GENUS ANDRENA FROM 

 NEW JERSEY. 



By T. D. a. Cockerell. 



The females of the species under consideration may be separated 

 by the following table. I have included two species of Colletes which 

 resemble Andrena and may be confused with it. The material herein 

 discussed was collected by Dr. J. B. Smith, and consists of species on 

 which he has made biological observations. 

 Base of metathorax (propodeum) with a transverse ridge enclosing a narrow strongly 



plicate area i. 



Base of metathorax without such a ridge 2. 



1. Hair of thoracic dorsum pale ochraceous and black Colletes inceqitalis Say. 



Hair of thoracic dorsum bright orange -ferruginous Colletes thoracica Smith. 



2. Larger species ; abdomen shining black without hair-bands ; thorax covered with 



ochraceous hair 3 . 



Smaller species ; abdomen with hair-bands at least partially developed 5- 



*Biologia Centrali-Americana, Vol. VI, Pt. i, and Supplement, Pt. i. 



