82 Annals Entomological Society of America [Vol. XI, 



the ultimate abdominal segment and indicated in Figures 2 and 3, by 

 the darker shading; often faint and indistinct in parts on the anterior 

 segments, but generally well-defined posteriorly. Lateral margins of the 

 body appressed. Skin delicately reticulated and tuberculated, trans- 

 versely rugose both dorsally and ventrally with the wrinl<;les either 

 isolated, separate and sub-parallel, or converging and confluent. 



Prothorax (Figs. 2 and 4, pro) with a broad, circumoral lip (Fig. 4, c. I.) 

 on ventral surface, penetrated in the middle by the transverse slit 

 through which the head-capsule may be exserted. Two pairs of ventral 

 tubercles, the members of the inner pair small and merely papillae. 

 Anterior, marginal tubercles three pairs, the median pair largest. One 

 pair of lateral tubercles. One comparatively large pair of dorsal tubercles. 



Mesothorax (Figs. 2 and 4, meso), 2 pairs of tubercles ventrally as in 

 the prothorax, small. Two lateral pairs, of which the members of the 

 anterior pair are more pronounced. Two pairs of median, dorsal tubercles 

 the members of the anterior pair the larger. 



■ Metathorax (Figs. 2 and 4, meta), with the ventral and lateral 

 tubercles similar to those of the mesothorax. Two pairs of small, 

 median, dorsal tubercles, all of equal size, the members of each pair 

 equally separate but not so widely separate as the median dorsals of the 

 mesothorax. 



Abdominal segments, dorsal tubercles: first segment (Figs. 2 and 4, 

 abd 1) with an anterior, small pair of tubercles and a larger median, 

 posteriorly-directed, single one behind. Segment II with three, single, 

 posteriorly-directed median tubercles, of which the first is smaller than 

 the second and the second than the third, the first and second not so 

 widely separate as the second and third. Segments III-VII each with 

 three, single, median, posteriorly-directed tubercles as in Segment II, 

 the first equidistant from the second as the second from the third; the 

 third tubercle largest of the median dorsals in each of these segments. 

 Lateral tubercles: segments II-VII each with four pairs of tubercles of 

 which the members of the second and third are more prominent than 

 those of the first and fourth. Ventral tubercles: first segment with one 

 pair of pseudopodia* situated posteriorly, broad at the base, bluntly 

 conical in shape. Segments II-VII each with a posteriorly-situated 

 pair of pseudopodia, larger than those of segment I, more widely 

 separate and bases broader. 



Eighth segment (Figs. 3 and 5) bearing the stigmal field and the 

 caudal appendages. Posteriorly, two pairs of processes of which the 

 members of the outer pair are directed latero-posteriorly, larger than 

 the members of the faintly-brownish, inner pair which are situated just 

 posterior to the anal orifice. Lateral tubercles two pairs, of which the 

 posterior pair is the larger, posteriorly directed. Ventrally, on each side 

 of the two rounded, anal swellings representing the pseudopodia of other 

 segments, is a pair of large, lateral, anal processes, directed latero- 

 posteriorly. The stigmal field (Fig. 3, s /.) somewhat depressed, 



*Explanation has already been made that this term was adopted to signify 

 the paired, ventral, locomotory tubercles of the abdominal segments. 



