( 544 ) 



I received from Mr. William Farren of t'aiubridge last June a large series of 

 Ceratopsi/lla '/nbata AVagner, taken from Scotophilus ijijAtitrdlus uear Ely, Cambs. 

 Since then 1 have taken a IVw examples at Tring from the same host. This species 

 has hitherto been unrecorded from Great Britain. 



Genus STEPHANOCIRCUS Sknse, Records Austral. Mas. II. p. T7 {\m\i). 



The genus was erected for an Australian species, St. dasyuri, found on 

 J>asi/ur>is nuwulatus. I describe here another species, which I think is congeneric 

 with dast/uri. 



>. Stephanocircus mars sp. nnv. (I'l. X\'l. f. 11 ?). 



The front of the head is incased in a helmet-like structure, much flattened 

 towards its anterior end. The posterior margin of this is modified into a ring of 

 thirty-eight teeth, of a similar structure to those on the prouotum. The portiou of 

 the head immediately above the antcuual groove is covered with short hairs, the 

 position of which is shown in the figure. The antennal groove and the gena are 

 both prolonged. The gena bears tiiree hairs, and along its posterior margin are six 

 strongly chitinized spines. The eyes appear to be entirely absent, but the small 

 tubercle in the characteristic position previously referred to is present. Tlic maxillae 

 are elliptical in shape. 



The pronotum bears three rows of bristles. The first row consists (on each 

 side) of about six small bristles, the second of about nine larger ones, and the 

 third of seven large and seven smaller ones arranged alternately. The posterior 

 margin of the pronotnm forms a comb of twenty-six bristles. 



The mesonotum bears two rows of bristles. The first row consists (on each side) 

 of six bristles of moderate length, while the second consists of five long and five 

 short bristles arranged alternately. The epimerou ( + episternum) is a large plate 

 covered with about fourteen short hairs. 



The episternum of the metanotnm is small, but the epimeron is much larger 

 and bears a double row of five bristles. The first two tergites of the abdomen are 

 ornamented with a single row of alternately arranged long and short bristles, 

 numbering nine and eleven respectively. Tlie third, fourth, fiftli, and sixth tergites 

 bear two rows of bristles. 



The seventh tergite bears similar hairs, but has in addition at its j)osterior edge 

 two long ones close to the middle line. At the posterior edges of the first, second, 

 third, and fourth tergite close to the middle line there are two small spines on each 

 side. A single spine is in the same position on the sixth tergite. The eighth 

 tergite is much enlarged, and ornamented with numerous hairs. The first seven 

 sternites bear a few hairs <inly. The tibiae are remarkable for their extreme 

 hairiness. 



Length 3 mm. 



JIab. llesperomys sp. (?), Argentina. 



I am much indebted to Dr. ( arlos Berg for a single specimen of this wonderful 

 iusect. 



