.TOUKNAT. OF ENTOMOf.OGY AND ZOOLOGY 



fellow of the opposite si.le „ii llie .lorso nie.lian line. Tliis hnr 

 and the -eiial plates Iniiii tli.. dorsal rraiiu'wrnk of the head 

 eai>side. l''ioiii the \-eiit I'o-latei'al aii-le of the niaiKlihle there 

 arises another Ion- har of .'liitin which rnns candad endin,^- 

 .•il)out on a h'vel with the median dorsal har. very little ex" 

 pande.l at its ti).; this hai- forms the lateral franiewoi-k of th.' 

 head rapsnle. .Ii/lniiia (plate I. (', h) arisin- on the inner 

 .•ephali.' an-le ,d' tlie -eiial plate just .hirsad of the hase of the 

 mandihie. It <'onsists ,,f a one se-mented. eyiindrieal. sli-litly 

 eurved or-an which I.eai-s a nnmher of Ion.-- hairs at its apex, 

 almost as I.mi- as the se-nient itself. Maiulihh's (plate I, II) 

 oxeeedin.yiy powei'fni. decussate, endin- in a ion- sliarp |)oint. 

 on its caudal or inner face heai'in- a prominent conical tooth 

 at alnnit midden-th, and with other hhint protuherances neai-ei- 

 the hase; .me of the \entral strands of muscle has an e-i-'- 

 shape.l, cliitinized pie,-e isolated in it. Marilhi arisin- just ven- 

 ti-ad of the mandiliular hase. articulated on its outer caudal 

 au-le with the lateral cliitinized hai- of the head; the palpus is 

 very sJH.rt. lyin- underneath the has.' of the mandihie, short 

 cylindri<'al. .'ndin- in a small cylimii-ical tip which is endos.-d 

 in a rounded tleshy apex; one of the two apical lohes of the 

 maxilla (galea or lacinia) persists as a vei-y elon-ate, i)ale. 

 i)lade-like organ proj.'cting fai- heyon.l the other mouth-parts. 

 ou tlie cephalic innei- face with a long supporting sti'and of 

 ehitin which is foi-ked near the hase. Menial n/iloi/ entirel\- 



lacking strongly cliitinized parts, tl nly indication <d' 



chitiiiization heing a pale yellow area continued from the tii)s 

 of the mandibles candad l)ut completely disappeaiing in caustic 

 potasli (If, solntioii, 24 hours). 



Sfiffiiial field small, oval, at the caudal end of the hody, the 

 stigmata occupying the dorsal portion of the area (plate 1, 

 K. L). Stigmata small, oval, placed rather ohli<|uely, their 

 dorsal ends diivcted inward, the distance hetween them less 

 than the length of one or ahout e(|ual to the small diameter of 

 one. A faint dusky maik fi-om the dorsal nuirgin of each 

 stigma to the edge of the field; a faint vertical stripe lying 

 hetween the stigmata. There are no distinct lohes arontid the 



