AMERICAN MUTILLID.E. 259 



Colorado : Fort Collins (Gillette). This species bears a close 

 resemblance to M. caneo Blake. 



124. jfliitilla nantila D. T. 



IlutUla pygmsea Blake. Tr. Am. Ent. Soc, vii. 250. 9, 1879 fiiec Gerstaecker). 

 Sphxrophthalma pygmsea Blake, ibid, xiii, 253, 9, 1886. 

 Mntilla nanula Dalla Torre, Cat. Hynj., vii, 65,1897. 



Texas; Nevada; Colorado. I have only seen specimens from 

 the latter region. 



Group anthophorie. 



Very similar to group imperialis, but with the first and second 

 abdominal segments of female uniting evenly, sessile, the male 

 having the first segment not nodose, but convex, and not more 

 coarsely punctured than the second. 



This group formed part of Blake's genus Photopsis (= Agama 

 Blake), and seems to be the American representative of the Euro- 

 pean subgenus Pseudophotopns Andre, from which it differs by the 

 unarmed postscutellum. The species known in the female sex, 

 when hitherto described, have been in nearly every case referred to 

 Spfuerophthalma; this has also been the case with the females of 

 group imperialis. 



MALES. 



First abdominal segment rather suddenly and distinctly narrowed anterioi- to 

 its stigma, the punctuation of the second dorsal, as a rule, becoming 

 sparser medially 9 



First abdominal segment not distinctly contracted anterior to its stigma, hut 

 rather evenly narrowed its entire length, the punctuation of second 

 dorsal rather even throughout jg 



2. First abdominal segment rather narrow and elongate, contracting rather 



sharply on basal half, its apical width considerably less than that of 

 the second segment, so that the latter is rather sharply contracted to 



meet it o 



First abdominal segment shorter and broader, not contracting very much on 

 basal half, its apical width greater, more nearly sessile with second . . 10. 



3. Wings subhyaline, at the most slightly tinged with yellow 4. 



Wings subfuscous. pubescence of abdomen yellowish 9 . 



4. Head not much narrowed behind eyes, at least not enough to make it triangu- 



lar from above 



Head considerably narrowed and produced behind eyes, apparently triangular 

 when viewed from above; space between hind ocelli greater than^that 

 between them and eyes; '' wings yellowish-hyaline." 



triaiigiiluris Blake. 



5. Apical abdominal segments more or less fuscous 7 



Apical segments concolorous with remainder of abdomen, pale castaneons ; 



first and second dorsal segments almost impunctate or nearly so 6. 



TRANS. AM. ENT. SOC. XXV. MARCH. 1899. 



