BRAZILIAN MUTILLA. 37 



not constricted medially, sides sparsely punctured ; raetathorax obliquely decliv- 

 ous, lateral margin without teeth, anterior angles of mesothorax acute ; legs stout, 

 middle tibiae with two short spines on outer edge and one large spine at tip, the 

 posterior pair have three larger spines on outer edge and a long sharp one at tip ; 

 basal segment of abdomen broader posteriorly, subnodose, constricted into a de- 

 pressed band at apex, before which is a transverse row of six or seven rather 

 large acute teeth. 



Black, with erect black hair, face and cheeks silvery; an oblique, rather ob- 

 scure silvery line behind each eye, confluent on occiput; two rather obscure 

 silvery spots on posterior margin of mesothorax, confluent with the two narrow, 

 silvery, longitudinal lines on metathorax ; a triangular silvery spot on each side 

 of thorax above middle coxae; calcaria pale; sides of basal segment of abdoiiien 

 and the depressed apical band silvery ; a round, smooth, polished, ferruginous 

 spot on each side of disk of second segment above ; segments 3-5 silvery, inter- 

 rupted medially; venter tinged with ferruginous. 



Santareni. (February, November). Two specimens. 



49. M. stygia Smith (Brit. Mus. Cat. Hym., iii, p. 47).— 9 .—Length 16 

 mm. — Head subquadrate, nearly as broad as thorax, and as well as the latter 

 coarsely sculptured ; eyes round, strongly convex, smooth and polished; thorax 

 square anteriorly and strongly constricted behind the very prominent subacute 

 lateral tubercle or spine ; anterior angles and sides of prothorax strongly tuber- 

 culate ; metathorax abruptly truncate behind, the flanks rugose, shining; abdo- 

 men oblong-ovate, first segment sessile with base of second, its upper surface 

 narrow and depressed, sparsely covered with short longitudinal carinje or ridges, 

 its anterior face broadly flattened; second ventral segment deeply and coarsely 

 and apical segment finely punctured. 



Black, opaque, the pubescence coarse and entirely black ; second segments above 

 with a medium sized, rounded, polished, reddish-yellow spot on each side of 

 disk, and a silvery pubescent spot on each side of basal segment at apex above, 

 sometimes obsolete or wanting, and also on each side of segments 3 6 above; 

 lateral margin of second segment beneath and apical margin of that and remain- 

 ing segments fringed with whitish pubescence; calcaria pale; one specimen has 

 faint indications of two pale stripes on metathorax and a spot on each side of 

 mesothorax at base. 



Santarem. Two specimens. Probably the same as fenestrata 

 Klug. Specimens will probably occur without any pale markings 

 except the two rounded, dull reddish yellow spots on second seo-- 

 ment. The shape of the thora.x and of first segment of abdomen is 

 much as in myops Burm., except that the sides of the thorax are 

 more prominently spinose. Closely resembles sereria Gerst., which, 

 however, has the sides of the apical segments of the abdomen broadly 

 golden pubescent; otherwise the two species are very much alike. 



50. M. inyops Burm., (Brasil, Mutill., 1854, p. 6).— f.— Length 11-19 mm. 

 — l^orm robust, black ; head not broader than thorax, ti-ansversely subquadrate; 



TRANS. AM. ENT. SOC, XXVIII. JANUARY, 1902. 



