PAUL K. JONES. 275 



vary in the color of the legs from nearly entire reddish-yellow to 

 specimens in which only the extreme base of the femora and apex 

 of the tibiae are reddish. The second joint of the antennae is about 

 two-thirds as long as the first joint, third joint broad, style composed 

 of two joints, second joint about two and one- half times as long as 

 the first and hollowed' out on the upper outer side, and in the center 

 of this depression there is a microscopic bristle. Front, face, thorax 

 and pleura covered with grayish pollen, that of the face slightly 

 yellowish. Pile everywhere light colored. Abdomen shining, 

 banded posteriorly with pollinose cross-bands which are nearly 

 interrupted in the middle, but wide on the lateral margins. 



liaphyslia sp. 



Two males and a female from Sioux Co. and a male from Halsey, 

 Nebraska, which appear to differ from the above species, but cannot 

 be separated by any good characters. They are smaller, more slen- 

 der, the head appears wider on account of the more slender abdo- 

 men, abdomen more shining metallic, the cross bands more silvery. 

 In the female specimen from Sioux Co. the face is yellow pollinose, 

 while it is silvery in the one from Halsey, the other specimens show 

 variations in between. The structure of the antenna? is the same as 

 in the preceding species. A male and a female from Lincoln, 

 Nebraska, and the sand hills seem to be intermediate between the 

 two species. 



Dr. Williston has kindly referred these specimens to the genera 



Laphystia and Triclis. 



6. TRICL.IS Loew. 



Triclis fiavipilis n. sp. 



9. LeugthlOmm. Black, shining with a bluish tint. Front wide, deeply 

 excavated, ocelli on a prominence, yellowish-red pollinose, bristles on each side 

 and those of the ocelli black. Face thickly yellowish-red pollinose, when viewed 

 in profile no convexity can be seen beyond the margin of the eyes until half-way 

 below the antenna; where the gibbosity is very j.ronounced. Mystax not extend- 

 ing above the gibbosity, black on the upper part and yellowish-red on the lower 

 part near the oral margin, a few reddish hairs immediately below the base of 

 the antenna. Antennse black, first joint longer than the second, third not as 

 long as the first two together, style a little more than a fifth of the third joint, 

 second joint of style more than twice as long as the first, hollowed out on the 

 upper side from which a microscopic bristle arises; first two joints of antennse 

 with black and reddish pile and longer black bristle-like hairs on the under side 

 of the first joint. Occiput with reddish pollen, occipito-orbital bristles black, 

 pile of the occiput, oral margin and beard fine, grayish-white in color, that of 



TRANS. AM. KNT. SOC. XXXIII. JULY, 190i 



