( 631 ) 



22. Ceratophyllus ahalae spec nov. (PI. XI. fig. 51 ; XII. fig. 55 ; XIII. fig. 60). 



Head. — The head is very strongly rounded (PL XI. fig. 51). There are 

 about eighteen bristles on tlie forehead, and some additional small hairs distributed 

 as shown in the figure. On the hinder part of the head there are two oblique rows 

 of bristles, besides a subapical row and a single bristle above the antennal groove. 

 Above the antennal groove are a great number of small hairs, and also several 

 behind the subapical row. The first and second segments of the maxillary palpus 

 are of the same length, being a little shorter than the fourth. The rostrum does not 

 quite reach to the apex of the forecoxa. The labial palpus consists of five segments, 

 of which the last is the longest, being nearly twice the length of the second. The 

 first segment of the antenna bears an oblique longitudinal row of four hairs, while 

 the second bears a transverse row. 



Thorax. — The prouotum has a comb of twenty-four teeth, and bears two rows 

 of bristles besides some additional hairs on the back and three or four short hairs 

 laterally. The mesonotum bears five oblique rows of hairs, besides numerous 

 additional ones, and has one subapical spine. There are five bristles on the 

 mesothoracical epimerum, and four on the episternum. The metanotum, which is 

 somewhat longer than the mesonotum, bears four rows of bristles. The meta- 

 thoracical epimerum bears twelve or thirteen bristles, besides some small hairs. 



Abdomen. — The abdominal tergites have three rows of bristles, the first row, 

 however, being short on segments 2 to 7, while on the first tergite there is an 

 additional fourth row in front. The seventh tergite bears two strong apical bristles 

 on a double cone on each side, the lower one being more than twice the length of 

 the upper and being of the same length as the metathorax. The stigma is long, 

 acuminate, and stands on all segments above the first bristle of the last row. 

 Between the first and second bristles there are two short hairs, indicating that the 

 species has here lost one long bristle. The first steruite bears a number of hairs 

 on the ventral surface, but none on the side. All the other sternites have a rather 

 large ventral patch of hairs, of which the posterior ones are prolonged. 



Legs, — The bristles of the forecoxa are very numerous. The mid- and hindcoxae 

 bear on the outerside a number of bristles at and near the ventral (anterior) edge from 

 the apex to the middle, the apical and subapical ones being long. There is also a 

 row of hairs at the ventral edge from near the base to the apex. The hindcoxa has 

 on the innerside a number of small hairs anteriorly near the apex. Posteriorly at 

 the apex there are two long bristles followed by a small hair. All the femora have 

 one small bristle ventrally near the apex on the innerside. On the outerside there 

 are on the forefemnr two rows of hairs and two subapical ventral bristles, while 

 on the mid- and hiadfemora there are three subajiical ventral bristles. The hind- 

 femur bears, in addition to the basal ventral pair of bristles, another bristle situated 

 behind the sinus. The tibiae are hairy all over the outer surface and at the ventral 

 edge. The longest dorsal apical bristle of the hindtibia is nearly one-third shorter 

 than the first hindtarsal segment. The first foretarsal segment is longer than the 

 second. The fifth segment of the fore- and midtarsus is peculiar. It bears on 

 each side six pairs of bristles besides a subapical pair. Of these bristles the first 

 and third are more ventral, while the fourth is more dorsal and thinner than the 

 others. Moreover, there are ventrally at the apex four siiiue-like bristles (PI. XIII. 

 fig. CO). The fifth segment of the hindtarsus bears five lateral bristles and two 

 ventral apical ones. The sole of the fifth tarsal segment is hairy. The first 



