1^8 PSYCHE [August 



procera is the only local species with complete and coarse transverse striae on 

 the notum. It is also the largest of our species, some specimens attaining nearly 

 an inch and a half in length. 



It is believed that the following table will give a truthful determination of the 

 species of this group as they have been defined, and since the species need no 

 longer be confused it is hoped that an interest in their study may be aroused. 

 Especially to .be desired is the observation of the habits of these intelligent wasps. 

 — a pleasant research, — for the ammophiles are intellectually superior to the 

 other fossorial Hymenoptera. as the entertaining records of Fabre, the Peckhams, 

 Williston, and others have shown. 



Table of the North Ainierican Species. 



Front wings with three submarginal cells, submedian cell but little shorter than the 

 median ................ 2. 



Front wings with but two submarginal cells ......... 3. 



2. Petiole of abdomen consisting of the first abdominal segment only (Psammophila) 4. 

 Petiole of abdomen consisting of the entire first segment and at least the basal portion 



of the second (Ammophila) iS. 



3. Second and third submarginals united. Black species with the base of the abdomen red 



(anomalous species oi Ammophila) 74. 

 Third submarginal cell wanting; submedian cell distinctly shorter than the median 



(Coloptera) 75. 



4. Body wholly black, piceous-black, or blue-black ....... 5. 



Abdomen more or less ferruginous .......... 7. 



5. Metanotum centrally opaque, closely punctiu^ed ... 10. piceivcnti ii Cam. 

 Metanotum shining, transversely striolate ........ 6. 



6. Slender; pubescence in part whitish; face silvery; abdomen more or less purplish 



2. lucfuosa Sm. $ . 

 Robust ; pubescence black ; face broad, black pubescent ; abdomen black 



2. lucttiosa Sm. $ . 



7. Pubescence of thora.x wholly black .......... 8. 



Pubescence more or less brownish, gray, or while ....... 13. 



8. Abdomen except the petiole entirely ferruginous ....... 9. 



Abdomen proper in part black ........... 1 1. 



9. Clypeus broadly projecting in the middle, the projection sinuated . 6. /(/.s£v/ Cam. 

 The margin of the clypeus pluridentate ......... 10. 



10. Wings with a yellow tinge ; metanotum obliquely rugose . . 3. t'<///V/./ Cress. 

 Wings with a violaceous tinge; metanotum transversely striolated 



II. quadridentata Q,^\\\. 



11. Metathorax rugose; wings violaceous ...... 8. sofwrvf/sis Cnni. 



Metathorax trans-striate ; wings violaceous-black to siibhyaline .... 12. 



12. Petiole of abdomen short, not extending beyond the hind trochanters; huge species 



4. ^rossa Cress. 5- 



