NO. 2242. MORPHOLOGY OF THE 8TREFSIPTERA— PIERCE. 471 



is intended to draw attention to the compact appearance of the 

 antennae. 



Male. — Length, 1.5 mm. The tarsi are very small. The anterior 

 tibiae are very robust and shorter than on the other legs. The 

 antennae are much more compact than is usual in this family. 

 The mandibles can not meet. The remainder of the description is 

 to be drawn from the generic description. The specimen was, unfor- 

 tunately, boiled in caustic potash and is therefore very hard to 

 study. 



Female. — Cephalothorax golden yellow to brownish, broader than 

 long ; constricted behind spiracles ; sides quite evenly rounded ; apex 

 sinuate. Mandibles obtuse, separated by almost three times their 

 width. Front convex. Spiracles just touching margin. 



Tijpe.—C^t. No. 18814, U.S.N.M. 



The illustrations in plate 77 bring out a number of features not 

 covered by the original descriptions. 



The prosternum is composed of a narrow transverse eusternum 

 and the medially divided sternellum which forms a half ring for 

 attachment of the coxae. This ring is undoubtedly composed of 

 sternellum, precoxale, and trochantin. At the lateral horn this 

 piece, together with the epimeron and episternum, separated by the 

 pleural suture, meet the coxa. The coxa is a small piece at the base 

 of the elongate trochanter (pi. 77, fig. 2). The pronotum is largely 

 of one piece, with small lateral pieces, probably scuti. 



The mesonotum is shorter on the median line than at the sides. A 

 semilunar piece in front is apparently the praescutum, the remainder 

 is the scutoscutellum. The sternum is the most perfectly formed of 

 any yet seen in the order. The eusternum is triangular. The ante- 

 coxal ring is composed of three distinct pieces. The inner pieces of 

 the ring are the stemellar pieces longitudinally separated; the 

 median piece is the precoxale. The coxale attachment is at the 

 outer horn, where three pieces — trochantin, episternum, and epime- 

 ron — meet. The coxa is a minute piece at the base of the elongate 

 trochanter (pi. 77, fig. 3). ' 



The metasternum has eusternum separated from sternellum by a 

 sinuate line. Episternum does not reach the coxa, although the 

 pleural suture does. The epimera are very large and almost sur- 

 round the coxae, which are more closely connected to the sternellum 

 than in the anterior segments (pi. 77, fig. 4). 



31. Genus PENTACLADOCERA Pierce. 



1. P. schivarzi Perkins; parasite of AgalUa, species; New South 

 Wales. 



1. PENTACLADOCERA SCHWARZII Perkins. 



Errata : Gen. Insect, p. 37, line 6, change " p. 6 " to read " pi. 4." 



