THE CANADIAN ENTOMOLOGIST. 323 



of posterior libic^, black ; tarsi somewhat ferruginous, rest of legs lemo?i- 

 yellow ; wings dusky hyaline, darker at anterior apical margin; nervures 

 brown, costa and stigma reddish-yellow ; flagellum bright ferruginous 

 beneath, dark brown above ; a few white hairs on head and thorax. 



Habitat. — Boulder, Colorado, June 27, 1905 (\V. P. Cockerell), fls. 

 of mariposa lily ( Calochortus Gunnisonii). 



This could hardly be the female of sexta, Say, as it is much smaller. 

 It differs as follows from Cresson's description (Philanthidse of N. Am.) : 

 flagellum ferruginous beneath for entire length; enclosure dull, not shining; 

 nervures brown, not ferruginous. It is near vicinoides^ Vier. & Ckll., but 

 may be separated by not having the mesopleura reticulated, the enclosure 

 striated at sides, posterior femora mostly yellow, and other characters. 



Two (^ 's from Boulder, Colo. (W. P. Cockerell), are probably males 

 of this species. In one the markings are whitish-yellow, not lemon-yellow. 

 In both the metathoracic enclosure is finely striated with broken striae, and 

 the face has more yellow, as is usual for the males of Philanthidae. 



Cerceris solidaginis, n. sp.--^. Length, 10 mm. Head nearly as 

 wide as the thorax, closely punctured with large punctures ; width of the 

 front below the antennae less than the length of the eyes ; ocelli in a low 

 triangle, distance between the lateral ocelli less than the distance to the 

 nearest eye margin ; high sharp carina between the antennae ; third joint 

 of antennae a little longer than fourth; clypeus punctured as front, produced 

 into a large triangular tooth anteriorly ; dorsulum with large punctures, 

 punctures closest at the sides ; scutellum punctured like dorsulum ; 

 mesopleura and pectus closely punctured with large punctures; metathorax 

 with Urge, close punctures, punctures running into the enclosure, so it is 

 almost wanting ; posterior tibice with teeth on the outer margin; first joint 

 of hind tarsi equal to 2 + 34-4; dorsulum of abdomen with close, large 

 punctures ; apical segment longer than wide, margined at the side, at the 

 apex with two short spines ; venter of abdomen shining, with a few sparse 

 punctures, a comb of long blackish hairs between apex and middle of each 

 segment. Colour black ; antennae brown, paler at base; mandibles (apex 

 piceous), clypeus, except narrow black border, face to a little above the 

 level of the antennae except around the antennae, two elongate .'^pots on 

 pronotum ; tegulae, two spots on scutellum, postscutellum, four anterior 

 legs below femora, dorsal segments 2-7 except at base (wider in the midde 

 of three, four, five and six), ie??ion-yel/ow ; four anterior trochanters and 

 femora, posterior legs below coxae ferruginous, or reddish-yellow ; wings 



