108 THE EARLY STAGES OF TABANID^ 



second segments edged before and behind with dark pubescence, especially on 

 the dorsum, the pubescence extending between the dorsal and lateral pseudo- 

 pods, thus enclosing the dorsal pseudopods in a dark ring. On each of the third 

 to the seventh segments inclusive is a patch of dark pubescence between the 

 lateral and the dorsal, and between the dorsal pseudopods, three patches on 

 each ring, the median patch being conspicuous. To the naked eye these me- 

 dian patches constitute a median dorsal line of black dots. 



On each of the third to the sixth segments, inclusive, are two patches of dark 

 pubescence, immediately anterior to the dorsal pseudopods. The posterior mar- 

 gin of the eighth segment bears dark pubescence. The surface of the larva 

 other than that bearing pubescence is shiny and longitudinally striated. 



Mature Larva. — (Plate 4, Fig. 57, b, Fig. 64, a, b, c.) Length 25 mm. Color 

 yellowish white. Mandibles dark brown to black, slightly serrated. Thoracic 

 segments shining and longitudinally striated, except the anterior margins, which 

 are opaque and pubescent. On the prothoracic segment are five longitudinal 

 grooves, one ventral, two sublateral, two subdorsal, not extending to the posterior 

 border. On the meso- and metathoracic segments are eight such grooves, four 

 on either side. The first abdominal segment bears one pair of ventral pseudo- 

 pods;'^ the second segment one pair of ventral and one pair of lateral; the third 

 to the seventh, two pairs of ventral and one pair of lateral. Traces of most of 

 the other pseudopods are present, especially of the dorsal pseudopods on the 

 fourth to the seventh segments. The pseudopods bear small colorless spines or 

 hooks, and similar though smaller spines are situated between the pseudopods 

 and on the dorsum of the first, second, and third segments where the pseudopods 

 are wanting. On the dorsum of the first and second segments these spines con- 

 stitute a double band. The posterior third of each abdominal segment is shiny 

 and longitudinally striated. The anus is edged with pubescence. The syphon 

 when exserted appears rather shorter than the eighth segment. 



Pupal Ca^e.— (Plate 11, Fig. 129; Plate 12, Fig. 141.) Length 17 mm. 

 Color yellowish brown, thoracic tubercles and abdominal spiracles darker, the 

 former bearing hairs. On the posterior third of the second to the seventh ab- 

 dominal segments is a ring of backwardly pointed spines, shortest on the second 

 segment and longest on the seventh. The eighth segment (Plate 12, Fig. 141, 

 a, h) terminates in a coronet of six teeth, chestnut brown in color, darker at the 

 tips, the lateral pair by far the largest, the dorsal and ventral pairs being about 

 equal in size, the former sometimes slightly the larger. The dorsal pair arises 

 from between the lateral teeth, the four teeth constituting a row. Ventrally 

 placed to this coronet are two rows of similar teeth, each row consisting of from 

 two to five teeth, the two rows together constituting an interrupted trans- 

 verse row. These teeth are unequal, and vary in size and number in different 

 specimens. 



^^ King uses the term "pseudopod" instead of "proleg" which should be used, 

 pseudopod being used in protozoology. 



