Oct., '08] ENTOMOLOGICAL NEWS. 377 



segment with large, strong punctures ; spines long, obtusely pointed, 

 lateral ones curved ; stipes of the genitalia broad, somewhat the shape of 

 a knife-blade, but not very sharply pointed ; at apex and sides with a 

 strong fringe of hairs ; ventral segments beyond first with some large 

 punctures among the close fine ones. Black ; spot on base of mandibles, 

 large transverse, irregular spots on clypeus, inner orbits for two-thirds of 

 the way above clypeus, narrow line on lower two third of posterior orbits, 

 palpi, line on pronotum, tubercles, tegulae, a line above, spot on each 

 side of scutellum, line on postscutellum, angles of metathorax, legs below 

 about the middle of femora, broad bands on dorsal abdominal segments 

 1-6, usually narrowly interrupted in middle, small spot on each side of 

 seventh dorsal segment, spots on sides of ventral segments 2-5, yellow or 

 greenish-white: the color of the legs is bright yellow, the other mark- 

 ings are more or less greenish ; stripes of genitalia reddish-yellow ; wings 

 yellowish hyaline, nervures brown ; head and thorax with white pubes- 

 cence, that on the head the longest ; in one wing the second tr. cu. is 

 wanting. 



Hab. Pecos, New Mexico, Sept. 2nd, at fls. of Melilotus 

 alba (Ckll.). 



This species is close to B. ventralis Say, but may be known 

 from it by the characters given in the above table, and in 

 having the first joint of anterior tarsi emarginate at base 



beneath. 



BEMBEX Fabr. 



Males. 



Prominence of sixth ventral segment bifid at apex amoena Hdl. 



Prominence of sixth ventral segment simple at apex i. 



1. Dorsulum spotted sayi Cress. 



Dorsulum not spotted, or at least not notably so 2. 



2. Markings of abdomen bright yellow ; femora yellow, except base 



sometimes; larger (20 mm.) nubilipennis Cress. 



Markings of abdomen greenish-white ; femora largely black ; smaller. 



spinolae St. Farg. 

 Females. 



Metathorax with a good deal of yellow ; larger I. 



Metathorax black, or with a little yellow ; smaller 2. 



1. Wings at base clouded nubilipennis Cress. 



Wings hyaline sayi Cress. 



2. Pleura black, without spots ; bands of abdomen continuous. 



spinolae St. Farg. 

 Pleura spotted 3. 



3. Bands of abdomen separated ; mesopleura with two spots. 



amoena Hdl. 

 Bands of abdomen continuous ; mesopleura with one large spot . . 4. 



