DIPTERA FROM NEPAL 5 



and Peng, 1938) sterno-pleurals (Kikkawa and Peng, 1938 : 552). 



Mesonotum : prescutum and scutum of the morphological mesonotum (Sturtevant, 

 1921 : 28). 



Abdominal tergite : sometimes abbreviated as T, e.g., iT means the first abdominal 

 tergite. 



The terminology of the male and female genitalia is chiefly based on Hsu (1949), 

 Nater (1953), and Okada (1954, 1956). The phallic formula (p.f.) is a series of 

 alphabetical signs indicating various characters of the phallic organs of each species 

 according to the following rules. 



(A) Aedeagus apparently bifid, or (a) fused. 



(B) Aedeagus non-pectinated, or (b) pectinated. 



(C) Aedeagus bare, or (c) pubescent. 



(D) Anterior parameres large, or (d) minute. 



(E) Anterior parameres articulated to the aedeagus, or (e) non-articulated. 



(F) Anterior parameres with sensilla mesad to or scattered evenly on the para- 



meres, or (f) distal, or absent (f ). 



(G) Posterior parameres (penis mantle sheath, Nater, 1953) non-contiguous, or 



(g) contiguous to each other to compose a "distal bow" (Fota-Pessoa, 1954), 



or (g ) absent. 

 (H) Posterior parameres non-branched or (h) branched. 

 (I) Novasternum with paired submedian spines (hypandrial bristles, Nater, 1953) 



on its caudal margin, or (i) without such spines. 

 (K) Novasternum without or (k) with a median notch on its caudal margin. 

 (L) Aedeagus vertically or (1) horizontally flattened. 

 (M) Aedeagus without or (m) with a prominent basal vertical rod or ventral 



recurved process. 

 (N) Basal apodeme of aedeagus as long as or longer than aedeagus, or (n) less than 



half the length of aedeagus. 

 A small alphabetical letter with attached dash (') indicates a feature intermediate 

 between those of the corresponding large and small letters. 

 Phallosomal index (PI) : a ratio in length of aedeagus and its apodeme. 



ABBREVIATIONS USED IN THE TEXT-FIGURES 



a. anterior paramere or anterior gonapophysis (phallic organs). 



d. decasternum or bridge connecting claspers (periphallic organs). 



e. aedeagus or penis (phallic organs). 



g. genital arch or novatergum (periphallic organs). 



h. subterminal hair (egg-guide). 



i. basal isthmus (egg-guide). 



k. clasper (periphallic organs). 



1. lobe (egg-guide). 



n. novasternum or hypandrial plate (phallic organs). 



o. basal apodeme of aedeagus (phallic organs). 



p. posterior paramere or posterior gonapophysis (periphallic organs). 



