Genus Colletesy/'o?n New Mexico. 49 



to 5 with very broad apical bands of light ochraceous pubes- 

 cence, base of second segment also hairj. Ventral hair-bands 

 ver}^ narrow at sides, widening to the middle. 



Hah. Mesilla, N. M., Aug. 29, 1896, on flowers of Bigelovia 

 Wrightii. 



From the male of C americana this will be known by the 

 colour of the legs. One would take it for the undescribed 

 male of C. ciliata^ Patton, but for the very strong punctuation 

 of the thorax. 



tt Punctuation of first abdominal segment sti-ong, feeblest and sparsest 

 in a species from Salix (C. salicicola). 



§ Lateral faces of posterior truncation of thorax dull ; the shiny 

 triangle narrowed below. 



:r. Larger; hind spur of hind tibia barely ciliate. 



Colletes cestivalisy Patton, 1879. 



Ruidoso Creek, N. M., 6600 feet, July 10, on Ehus, six 

 females, one male {E. 0. Wootoa). 



These differ in no important respect from a specimen of 

 cestivalis from Illinois, received from Mr. E-obertson. 



XX. Smaller ; hind spur of hind tibia very finely but very 

 distinctly pectinate. 



Colletes cJiarnKsarachcBj sp. n. 



$. Length about 10 millim. 



Black, with short dull grey pubescence. Head tolerably 

 broad ; eyes not bulging at top ; face and cheeks with sparse 

 grey pubescence ; clypeus bare, shining, strongly but not 

 very densely punctured ; sides of vertex sparsely punctured, 

 shining; a broad dull groove in front of the upper part of 

 each eye; labrum with a deep median longitudinal furrow; 

 mandibles stout, rounded at tips, the notch near the end ; 

 space between mandible and eye very short ; flagellum dark 

 brown beneath from the third joint to the end, its second joint 

 shorter than the third and only half as long as the tirst. 

 Prothoracic spine rather short, but very slender and sharp. 

 Mesothorax with very large close punctures, absent on disk. 

 Anterior half of scutellum impunctate, posterior half with 

 large punctures. Base of metathorax divided by ridges into 

 quadrate spaces which arc longer than broad. Lateral faces 

 of posterior truncation irregularly and obscurely reticulate, 

 dullish because microscopically lineolate or subreticulate. 



Ann. & Mag. N. Hist. !Scr. 6. Vol. xix. 4 



