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132 Journal New York Entomological Society. [Vol. ix. 

From what we know of the genus Myochrous, in Mexico and to 
the southward, we may with more data be able to trace denticollis back 
to its southern home. According to Mr. Martin Jacoby,* M. melan- 
cholicus, a species very closely allied to denticollis, 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 denticollis, 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 sallcei, albovillosus 
and carinatus, from Mexico, and tibialis, from British Honduras and 



Fig. I. Myochrous denticollis, dorsal view. 
Fig. 2. " " lateral view. 

Fig. 3. Corn plant showing ravages of Myochrous denticollis. 

Fig. I. General effect of attacks of M. denticollis. 

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


Map showing distribution of Myochrous denticollis, M. squamosus and M. 




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 1. 

Base of metathorax without such a ridge 2. 

1. Hair of thoracic dorsum pale ochraceous and black Colletes inaqualis 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. 

Small* species ; abdomen with hair-bands at least partially developed 5' 

*Biologia Centrali-Americana, Vol. VI, Pt. 1, and Supplement, Pt. I. 


3. Hair at end of abdomen ferruginous dunningi Ckll. 

Hair at end of abdomen black 4. 

4. Hair of pleura black ; process of labrum rounded carlini Ckll. 

Hair of pleura pale ; process of labrum truncate vicina Smith. 

5. Abdomen shining, with strong punctures ; hair at apex of abdomen pale ferrugi- 

nous hippotes Rob. 

Abdomen tessellate, with minute punctures ; hair at apex of abdomen sooty or 
purplish-black 6. 

6. Stigma and tegulae piceous ; process of labrum deeply bifid sp. incert. 

Stigma and tegulse ferruginous ; process of labrum conical in outline, the apex 

rounded and entire .placida Smith. 

Andrena dunningi Ckll. 

Both sexes from Newark, in May. A. viciniformis Rob., is a 
synonym ; at least, I can find no difference. 

Andrena vicina Smith. 

One 9 from Burlington Co., May; marked " bicolor." It was 
unexpected so far south. 

Andrena carlini Ckll. 

Females from Jamesburgh, May ; Burlington Co. , May ; Prosper- 
town, June i ; one is marked "vicina." 

Andrena bi punctata Cress. 

S, Newark, May. $, Prospertown, June i. Not included in 
the table ; the $ has the clypeus yellow with two black spots ; the $ 
is known by the small size, clypeus (black) punctured only at sides, 
the middle smooth and shining, process of labrum broad, abdomen 
tessellate and practically impunctate, wings yellowish, nervures and 
stigma honey-color, etc. 

Andrena hippotes Rob. 

Newark, May. Marked" nuda. " It agrees exactly with a speci- 
men of hippotes received from Robertson. The four hind tarsi, and 
the two hind tibiae of the $> are red. 

Andrena placida Smith. 

Jamesburgh, May. Identified from the description, but I think 
certainly correct. Marked " A. viola" but not congeneric with 
Iomelissa viola, Rob. 

Andrena, sp. incert. (See table. ) 

A $ with no data; marked " salicis," which it is not. 

134 Journal New York Entomological Society. [Vol. ix. 

Colletes insequalis Say. 

Lahaway and Newark ; both sexes. April, May. Labelled " A n- 
drena hilaris. ' ' 

Colletes thoracica Smith. 

One 9 , Lahaway, June 20. Hitherto known from Florida. It 
has a superficial resemblance to the European Andrena nitida. 

Colletes, sp. incert. 

Prospertown. Marked " compacta, " but not that species ; allied 
to C. astivalis. I have compacta from Mr. Robertson, and believe it 
is correctly identified. Not in table. 


By D. W. Coquillett. 

The present paper is an attempt to settle the question of what 
species is the type of each North American and European genus of 
Anthomyidae that has been proposed up to the present time, a ques- 
tion of vital importance both as regards the synonymy and also the 
correct names for the various genera. In those cases where the origi- 
nal describer of a given genus did not designate the type species, and 
more than one species was mentioned or described, the first species, or 
at least the first of the recently recognized species, has been selected 
as the type, and when none of the species have been recently recog- 
nized the question of the type species has been left open ; cases of 
the latter kind are chiefly confined to Rob.-Desvoidy's ill-conceived 
and very imperfectly described genera and species, and it is to be 
hoped that some one more familiar with the Anthomyidae of France 
will settle this phase of the question in a satisfactory manner. 

Genera and their type Species. 
Achanthiptera Rondani. Type as given, Musca inanis Fallen. 
Acroptena Pokorny. Described one species as new, simonyi. 
Acyglossa Rondani. Type as given, Acyglossa diversa new species. 
Adia Desvoidy. Described one species as new, oralis, not since 

sEgeria Macquart. Change in spelling Egeria.