36 ^Ir. T. 1). A. Coekerell on 



Triepeolus nautlanus, sp. n. 



^ . — Length 9|-11 millim. 



Agreeing with T. lunatus and T. concolor except as 

 follows : — Light inaikings of thoracic dorsum, and particu- 

 larly of dorsal segments of abdomen, light orange ; sixth 

 dorsal segment with the pubescence entirely silvery white, 

 in strong contrast with the orange of the other segments ; the 

 extreme sides of the second to tifth segments are touched with 

 silvery white, which is most conspicuous on the fifth ; the 

 bands on the second and third ventral segments are silvery 

 white, the erect curved hairs on the fourth and fifth being 

 luscous ; the pubescence of the face is entirely silvery (not 

 golden at the sides as in T. favofasciatus) ; the lower part of 

 the pleura is hairy, with an ill-defined bare central area ; 

 mandibles with a dull red spot in middle of outer side; an- 

 tennae black, first joint of flagellum red beneath ; tibije and 

 tarsi red, spurs ou middle and hind tibiae black; femora 

 black, reddened at apex, and the middle femora sometimes 

 red beneath ; the tibi^ vary to black, but the tarsi in such 

 specimens remain red. 



Hah. Vicinity of San Rafael, Rio Nautla, State of Vera 

 Cruz, Mexico [0. H. T. Townsend). The dates are March 13 

 and April 7 ; it occurs at flowers of plant no. 1 of Tovvnsend's 

 collection, which is a species of Compositse. 



The insect is a tropical representative of T. lunatus, appa- 

 rently constant in its bright colours. It is possible that 

 T. nautlanus may prove to be the male of the species 

 described by Cresson from the female as Epeolus totonacus. 



Triepeolus nevadensis (Cresson). 



Albuquerque, New Mexico, Sept. 15. 



Eecorded erroneously in Bull. Denison Lab. as Epeolua 

 remigatus (p. 73) and E. rohustus (p. 61). It is easily known 

 from rohustus by the prominence between the antennje, 

 E. rohustus was described from New Mexico, but I have not 

 met with it. 



Triepeolus pimarum and T. mesillcB^ spp. nn. 



The females of these two species agree in the following 

 characters: — Light markings of thorax and abdomen cream- 

 colour ; first abdominal segment with only a very small 

 median black mark ; second to fourth segments with broad 

 even bands, that on second with no anterior lateral processes; 

 labrum, greater part of mandibles (at least), and first three 



