204 [August 



moderate, normal, appressed to the moutli and not extending forwards 

 in the form of a horn. No palpi visible externally. Labium large, 

 subquadrate, rather wider than long and not emarginate. Eyes S large 

 and almost contiguous ; eyes 9 much smaller and separated by a space 

 equal to one-half the diameter of the head, with distinct rudiments of 

 the two posterior ocelli between them. Antennte (Fig. II.) inserted 

 in a large but shallow cavity before the eyes, eight-jointed or there- 

 abouts, the joints rather indistinct with appearances in some specimens 

 of a 9th long and slender setiform joint. Thorax with the pro- meso- 

 and meta-notum confluently soldered together in the form of a large 

 convex shield, which has an inflected lateral flange for its entire length 

 like the epipleura of the Coleopterous elytrum, and the tip of which 

 fits accurately into a transversely sinuate medial groove on the fifth 

 dorsal joint of the abdomen, immediately behind which groove runs a 

 transverse carina. On the lateral edge of this shield about t of the 

 way to its tip, and also on the side of its dorsum about | of the way 

 to its tip, there projects a large flattened triangular tooth, the lateral 

 teeth (Fig. I. a) directed outwards, the dorsal teeth directed out- 

 wards and upwards and prolonged both forwards and backwards in an 

 acute carina or elevated and angulated ridge. From the central point 

 of the dorsum of this shield there extends obliquely forwards on each 

 side a wide, shallow, ill-defined stria or depression which terminates 

 before it reaches the latei-al edo;e, the two striae forming with each 

 other from their origin an angle of about 90°. These striae probably 

 represent the suture between the pi'O- and meso-notum. Along the 

 whole length of this shield, but obscurely interrupted before its middle 

 and again just before its tip, extends a not very acute dorsal carina. 

 Prosternum divided throughout by a suture, which is apparently con- 

 nate, from the meso-sternum. Meso- and meta-sterna confluent with each 

 other, as well as all the episterna and epimera. Central piece of sternum 

 truncate in front, about as wide between the front legs as the anterior 

 acetabulum, with the suture behind the front legs transverse, thence 

 gradually widening to double its former width a little behind the middle 

 legs, thence to its posterior edge, which is squarely truncate, with its 

 sides nearly parallel. Abdomen 9-jointed dorsally, 8-jointed ventrally, 

 joints S and 9 being ventrally confluent. The dor.sal joints 1 — 4 and 

 the anterior i of 5 soft and membranous, except a narrow lateral piece. 



