226 CHAS. A. BLAKE. 



Second abdominal segment above fuscous, with a pale golden cross (the 

 longitudinal bar not well defined medially); head entirely 



ferruginous 96. petricola. 



Second abdominal segment above blackish, with a transverse pale golden 

 band, interrupted medially; head ferruginous, vertex with 



pale golden pubesoence 97. auripes. 



Second abdominal segment above blackish, with a transverse, sinuate, pale 

 golden band ; head fuscous, vertex with a pale golden pubes- 

 cence; size minute 98. minutissima. 



Second abdominal segment above black, with two round, distant, yellow- 

 ish spots near apical margin, which is narrowly pale golden, 

 and two approximate ferruginous dots on basal margin ; head 



black, face and cheeks ferruginous 99. psammadroma. 



Second abdominal segment above ferruginous, with apical maigiii more or 

 less broadly black; head entirely ferruginous, carinse on jios- 



terior angles not prominent 100. similima. 



Posterior angles rounded, not carinate. 

 Head and thorax black, reddish-brown above ; second abdominal segment 

 bright ferruginous, aj)ical segments fringed with silvery pubes- 

 cence 101. brazoria. 



Head, thorax and second abdominal segment above entirely ferrugi- 

 nous 102. montivaga- 



The genus may be divided into the following subgenera : 



Antennse of male flabellate Psammotiikrm a. 



Antennae simple in both sexes. 



Eyes ovate, emarginate in male Mutilla. 



Eyes small, round, convex Spu.kropthal.m a. 



Subgenus PSAMMOTHERMA. 



This is distinguished from all the other subgenera of Mutilla by 

 the % antenna! being flabellate. The ueuration of the anterior wing 

 is much like that of the first division of the next subgenus, (fig, 1), ex- 

 cept that the third sabniargiual cell is not hexagonal, but rather sub- 

 triangular, shaped cjusidei'ably like that o( occideafalis (fig. o), 



This is only the second species of this subgenus so far known, the 

 first being from Senegal — the F./lubc/lata, Latr., which difl'ers by the 

 second abdominal segment being ferruginous. , 



1. Mutilla (Fsaminotlierma) Ajax, n. sp. 



Male. — Black, head round, densely punctured, mouth clothed with pale golden 

 hairs, mandibles black ; antennse : scape finely punctured, clothed with pale 

 glittering hairs; flagellum consisting of eleven joints, ten of which are strongly 

 bipectinate; eyes ovate. Thorax elongate quadrate, rounded in front, j)ro- 

 and anterior half of themesothoracic disc rufo-ferruginous, coarsely jsunctured, 

 the latter having two longitudinal, deeply impressed lines, scutellum black, 

 rounded, closely punctured, post-seutellar groove distinct, metathorax roundly^ 

 truncate, coarsely an 1 deeply reticulate. Teguhe rufo-ferruginous, produced 

 posteriorly, finely punctured. Wings ami)le, fuliginous, paler towards the 



