16S THE CANADIAN ENTOMOLOGIST. 



anterior border of mesothorax with the two hair patches distinct ; scutel- 

 lum not tuberculate in middle ; axillar spines large, slightly curved ; base 

 of mesothorax without conspicuous pits ; wings darkened apically ; first 

 r. n. meeting first t. c; abdomen with hair bands as in C. quercina ; apical 

 structures of the same type as in C. quercina, but the median spine large ; 

 fourth ventral bidentate. 



Coelioxys hirsutissima, n. sp. — Male ; Kenworthy, San Jacinto Mts., 

 Calif, 5.000 ft., June 8 (F. Grinnell, jr.). 



Length about 8^ mm. (abdomen retracted); black, with white hair, 

 abundant on head and thorax, and forming entire apical bands (but no 

 subbasal ones) on all the abdominal segments ; eyes light green, with long 

 hair, as in C. erysimi ; antennse black; apical half of mandibles red; 

 tegulc'e red; legs red, with while hair; cheeks hairy; scutellam not 

 tuberculate in middle ; axillar teeth rather short ; fifih abdominal segment 

 without lateral spines, sixth with slender lateral spines ; apex quadridentate, 

 the two lower teeth broad, hardly so far apart as the length of one, slightly 

 curved inwards ; ventral hair bands very dense ; ventral segments with 

 numerous fine punctures, producing a ralher rugose effect, wholly different 

 from the smooth surface, with scattered strong punctures, of the venter of 

 C. erysimi^ quercina 2iwà fragarice. 



The following table compares the above-described species with various 

 other male Coelioxys : 



Abdominal bands bright orange-ferruginous, confined to the apices of 

 the segments; no median tooth in apical emargination of abdomen 



(Assam) tur?ieri Ckll. 



Abdominal bands not orange or red . i . 



I. Apex of abdomen red, each apical lobe strongly tridentate ; anterior 

 cox?e without spines (Willowmore, Cape Colony ; 



(Brauns) afra Lepeletier. 



Apex of abdomen not red 2. 



2 Apex of abdomen multidentatC; each lobe with more than two teeth .3. 

 Apex of abdomen quadridentate, or quinquedentate by reason of a 



smsll median tooth 8. 



3. Segments 2 to 5 with hair bands at apex only ; mandibles red 



(Willowmore, Cape Colony ; Brauns) difformis Friese. 



Segments 2 to 5 with basal or subbasal hair bands, interrupted in 

 middle ; mandibles black ; fourth ventral segment strongly biden- 

 tate apically; anterior coxae with conical, stout, ralher short spines; 

 hind spurs red 4. 



