T. D. A. COCKERELL. 239 



head and thorax very pale grayish, delicately ochreous-tinted on tho- 

 racic dorsum ; facial quadrangle about as broad as long ; eyes pale 

 bluish-green ; clypeus shining, with very large more or less confluent 

 punctures, and a broad shining median ridge ; antennae black ; meso- 

 thorax coarsely punctured, but shining between the punctures ; tegulse 

 black in front, ferruginous behind ; legs black, with pale grayish hair, 

 ferruginous on inner side of hind basitarsi ; wings grayish ; abdomen 

 rather narrow for the genus, black, with very broad bands of grayish- 

 white tomentum ; the second segment is covered with this tomentum 

 except the bare apical margin, and the extreme base, which has black 

 velvety tomentum, broadening a little at sides ; the third and fourth 

 segments have the bands broad and even, with about the basal two- 

 fifths of third and one-half of fourth covered with black velvety tomen- 

 tum ; the fifth segment has the broad fringe white, stained with choco- 

 late in the middle ; the apical has the hair strongly stained with choco- 

 late ; apical plate rather broad. 



Habitat. — Albuquerque, New Mexico, at flowers of Phace- 

 lia corrugata A. Nelson, April 29 (/. R. Watson). Known 

 from T. anncB Ckll. by the creamy-white (not ferruginous) 

 hair on outer side of hind tibiae and tarsi, the strong median 

 ridge on clypeus, and the denser and whiter abdominal 

 bands, those on third and fourth segments without overlap- 

 ping long black hairs. From T. beltragei (Cress.) it is easily 

 known by the very broad bands, especially that on second 

 segment. From T. doiigJasiaiia Ckll. it is known by the black 

 at extreme base of second abdominal segment and the ridge 

 on the clypeus. 

 Melissocles atrifera sandiaruiii Ckll. 



A male collected by Professor Watson at flowers of Croton, 

 Sandia Mts., New Mexico, July 26, differs from the type in 

 having a light yellow band across the lower part of the cly- 

 peut, reminding one of M. hexacantha Ckll. (which has much 

 shorter antennae) andM. coniiisiformis Ckll. (which has much 

 darker antennae). 

 Ceratiiia sexmaciilata Smith. 



Smith correctly associated the sexes, but Bingham de- 

 scribed and figured the male of sexmaculata as a female, and 

 probably confused the true females with C. binghavii. C. 

 binghami is a distinct species, the male having no black 

 patches on the abdomen. From the British Museum I have 



TRANS. AM. ENT. SOC. , XXXVII. 



