88 E. T. CRESSON. 



at tip, a stripe on first five joints above, sometimes only on fourth and 

 fifth, and lateral half of following joints except margins, black or 

 fuscous, first joint short, robust, second joint very short and trans- 

 verse, third fourth and fifth joints long, cylindrical, subequal, the 

 third being a little shorter than the fourth which is equal in length 

 with the fifth, sixth joint broadly dilated towards apex, about as long 

 as third, seventh joint very short and as broad as the sixth, remaining 

 joints narrower and coalite, the sixth and following joints forming 

 the club are flattened above and concave beneath, the outer margin 

 deeply erose; thorax marked as in 9 , except that the yellow markings 

 are less heavy, the pleura has a large ovate spot, the scutellum is 

 margined posteriorly from base of wings, sometimes interrupted, the 

 postscutellum has sometimes a short discal transverse line, the meta- ' 

 thorax has sometimes a double spot on basal middle and a narrow line 

 covering lateral angles, all yellow ; wings yellowish dusky, paler than 

 in 9 , tip of marginal cell fuscous; legs Colored as in $ , the inter- 

 mediate tibise suddenly dilated anteriorly both on outer and inner edge, 

 also middle of their femora beneath ; abdomen elongate, shining, base 

 of segments depressed, the bands on segments 1 — 4 narrow, slightly 

 dilated laterally, those on the five basal segments are squarely emargi- 

 nate on each side anteriorly, sometimes only those on segments 2 — 4 

 are slightly emargiuate on each side anteriorly, the bands on two or 

 three apical segments very broad; apical margin of terminal segment 

 subarcuated with prominent lateral angles and beneath with two stout 

 subacute black teeth ; venter broadly banded with yellow, the second 

 segment prominent on basal middle, the third segment transversely 

 elevated with a stout subacute central tooth pointing posteriorly, apex 

 with a patch of deuse pale pubescence. Length .50 inch. 



Hab. — California. Four £ 9 specimens were collected by my 

 friend Henry Edwards, Esq., of San Francisco, to whom this inter- 

 esting species is respectfully dedicated; and one % specimen was col- 

 lected, and kindly presented to the Society, by Lord Walsingham. 



This fine species is more closely allied to zonalis than to any of the 

 other species. It is larger and more robust than zonalis, with broader 

 abdominal bands in 9 , while the antennal club and apex of abdomen 

 in % are entirely differently shaped, the deeply erose inner edge of 

 the former being a ready distinguishing character, quite different from 

 anything to be seen in any of the other five species. 



