50 Myron Harmon Swenk 
dle June to latter August (June 14-August 23). Mr. Robertson 
originally described the species from three female and two male 
spegimens captured by him at Carlinville, Illinois, and has kindly 
sent me metatypes of both sexes for study. In 1905 I described 
C. vierecki from four female cotypes collected at Anglesea, New 
Jersey, August 8, 1g01, on “white umbellifer” by Mr. H. L. 
Viereck, supposing it to differ sufficiently in the lack of distinct 
postscutellar pits and average larger size to warrant specific sep- 
aration from nudus, but additional material has shown these 
characters to be variable, so that I am now unable to separate 
vierecki satisfactorily and have placed it in the synonymy of 
nudus. My records go to show that this species is a common 
visitor on Ceanothus americanus in June and July. 
SPECIMENS ExAMINED—Arkansas: Marion county, 1; Illinois: 
Carlinville, 2; Maryland: Indian Head, 2; New Jersey: Angle- 
sea, 6; Texas: Fedor, 3; Virginia: Falls Church, 4; Glencar- 
tym; XT. 
Colletes fulgidus Swenk. 
1904. Colletes fulgidus Swenk, Canadian Entomologist, xxxvi, pp. 95-97, 
29 fg (April, 1994); original description. 
2. Length 10 mm. Clypeus shining, flattened, usually slightly medially 
suleate, coarsely punctured on a striate surface, the punctures well sep- 
arated. Supraclypeal area laterally punctured. Front dull, with small, 
crowded punctures, the foveae imounctate, suboval, about twice as long 
as wide. Face covered with erect, short, gray pubescence, longer and 
tinged with ochreous on vertex, short and pure white on cheeks. Sides 
of vertex very finely and sparsely punctured, shining. Cheeks dull, with 
fine, shallow, close punctures. Malar space one-sixth as long as broad. 
Antennae black or with the flagellum obscurely brownish beneath, joint 
3 longer than 4 or following joints, the proportion being 4:3:3. Protho- 
racic spine short, stout, and sharp. Mesothorax very coarsely and deeply 
punctured, the punctures very close and sometimes cancellate, on the large 
polished disk few or none, a broad subimpunctate line bounding each 
parapsidal groove. Scutellum hardly punctured except along posterior 
margin, postscutellum dull and finely roughened. Anterior margin of 
thorax with a dense fringe of erect hair, whitish, tinged with ochreous, 
mixed with a few black hairs, this fringe passing along the sides within 
the tegulae and covering the postscutellum. The space within this circle 
of pubescence almost bare, only a few scattered black bristles, becoming 
denser toward the sides and forming a fringe of black hairs along the 
Q2 
