208 



MTJTILLIDiE. 



This species resembles Mutilla mirabilis, described in the seventh 

 volume of the Proceedings of the Linnean Society, from Waigiou ; 

 but that species has the scape and legs entirely ferruginous. 



South- Ameeican Species. 



Div. I. The thorax ferruginous. (Sp. 54-68.) 



54. Mutilla crassicornis. 



Female. Length 2-2| lines. — Perruginous, not shining ; legs palest ; 

 head, thorax, and abdomen evenly and very closely punctured. The 

 head covered with pale gold-coloured pubescence ; the apical margin 

 of the second segment of the abdomen, and the rest of the segments 

 entirely, with similar pubescence to that on the head ; the antennae 

 short and incrassate, darkest towards their apex. The whole insect 

 is clothed with thin, scattered, pale, erect pubescence. 



Hah. Ega, St. Paulo and Obydos, on the Amazons. 



55. Mutilla ambigua. 



Female. Length 3| lines. — Black, very closely punctured ; the thorax 

 ferruginous and black anteriorly and posteriorly above. The apex 

 of the scape and also of the flagellum ferruginous, and both ob- 

 scurely so beneath ; mandibles ferruginous in the middle. Thorax 

 oblong-ovate ; the coxae ferruginous, the femora obscurely so be- 

 neath. Abdomen with the first segment cylindrical, ferruginous, 

 and with an acute tooth at the base beneath ; its apical margin 

 above with whitish pubescence ; the apical margin of the second 

 segment with a fascia of pale yellowish-white pubescence, and the 

 following segments covered with the same ; the apex ferruginous. 



Hah. Obydos. 



56. Mutilla subtilis. 



Female. Length 4 lines. — Black ; the thorax ferruginous, the apical 

 margins of all the segments of the abdomen with yellowish-white 

 fasciae. Head large, wider than the abdomen ; subquadrate, with 

 a line of pale golden-yellow pubescence running obliquely from the 

 insertion of the antennae to the eyes and thence to the vertex, 

 then inwardly, where the lines unite. Thorax oblong, very closely 

 punctured, slightly contracted towards the apex ; the lateral mar- 

 gins of the metathorax finely crenulated ; the tibiae and tarsi with 

 short whitish pubescence, most dense on the anterior and inter- 

 mediate pairs ; the intermediate and posterior tibiae spinose exte- 

 riorly. The fasciae on the abdomen continued on the margins of 

 the segments beneath. 



Hah. Ega. 



