NO. im:!. REVISIOX OF FAMILY PTYCHOPTRRI 1>.I,—AIJ:.\A.\ DEK. 333 



gate, slender, extremely pointed stylets which I believe to be 

 homologous with the maxilhe of certain other Diptera (Tabanidse); 

 at tlu' l)as(> of the raaxill», boneatli tlie clypeus, arise the elongated 

 maxillaiy pal])i (c), which arc almost as long as the antenna;; these 

 palpi are 5-segmented; segment 1 short; 2 twice as long as 1; 3 

 longer than 1 and 2 combined; 4 and 5 subequal, longer than 2 

 but shorter than 3; palpi clothed with long appressed hairs; between 

 the labrum and labium, there projects an elongated stylet, almost 

 as broad as tlie labrum, which seems to be liomologous with the 

 hypophaiynx (/); the possibility exists, however, that it may con- 

 sist of the two mandibles closely applied to one another. The 

 specimen is unique and I do not care to 

 remove the mouth parts. The elon- 

 gated labium (h) apparently l3-seg- 

 mented, and bearing a pair of l)roa<f 

 palpi at the tip, arises from the ven- 

 tral surface of the head; %'iewe(l from 

 beneatli, the labium is seen to consist 

 of a basal and apical piece, the latter 

 deeply di\'ided by a longitudinal fur- 

 row; the palpi divergent, their margins 

 clotlied with long, stout hairs; from 

 between the palpi there projects out- 

 ward a nan'ow compressed organ ((/) ; 

 this may (in case the organ (/) de- 

 scribed above as possibly being the 

 hyjiopharynx is not this) be tlio liyi)o- 

 pharyiLX. In this case the mandibles 

 would be present and accounted for in 

 the organ described above as the hypo- 

 pharynx. 



Occipital region narrowed behind, 

 broadening to the vertex; vertex nar- i-*""!^" « maxima 

 rowed between the eyes, its sides parallel; front encroaching unto the 

 inner marguj of the eye in a broad, shallow sinus, in which the anten- 

 nae (a) are located. Antcnnse, 1 7-segracnted ; the scapal segments 

 almost smooth or with very small hairs; both segments short, the 

 first cylindrical, the second oval, its distal eml more enlarged; the 

 flagallar segments clothed vnih dense appressed hairs; basal flagellar 

 segments almost subequal; ai)ical segments more elongated. (See 

 figs. 1 and 2.) 



Mouth-parts yellow, the labium brown; maxillary palpi dark 

 brown; clypeus dull brownish gray; antemia; dark brown, the cloth- 

 ing of hairs on the flagellum rather paler. 



