new Species of Di/doptera. 31 



Diploptera, Latr. 

 Masaridae, Leach. 



Key to the Genus Paragia, S/tuckard. 



A. Median segment produced into spines at poste- 



rior angles. 



a. First recurrent nervure interstitial with first 



transverse cuhital nervure P. maculata, sp. n. 



b. Both recurrent nervures received by second 



cubital cell. 

 « 2 . Wings without a fuscous band along the 

 costa. 

 a 3 . Wings flavo-kyaline, broadly fuscous at 



apex P. walkeri, sp. n. 



b 3 . Wings pale flavo-hyaline, radial cell 



fuscous P. morosa, Sm. 



b' z . Wings stained with fuscous along the 

 costa. 

 a 3 . Second abdominal segment mostly 

 orange. 

 «'. Second abdominal segment with small 



black mark at base P. calida, Sm. 



6 4 . Second abdominal segment with nar- 

 row black fascia at base P. excellent, Sm. 



b 3 . Second abdominal segment almost or 

 quite black. 

 a 4 . Median segment wholly orange .... P. sobrina, Sm. 

 b*. Median segment nearly or entirely 

 black. 

 a 5 . Median segment entirely black. 

 a 8 . Basal half of third abdominal 



segment black P. odyneroides, Sm. 



6 6 . Third abdominal segment almost 

 entirely orange. 

 « 7 . Scutellum entirely black .... P. bidens, Sauss. 

 b 1 . Scutellum marked with orange. P. prcedator. Sauss. 

 b 5 . Spines of median segment orange. 

 a e . Segments 4-6 of abdomen almost 



entirely black P. nasuta, Sm. 



b e . Segments 4-'J of abdomen with 



orange fascias P. venusta, Sm. 



B. Median segment rounded or not produced into 



spines at posterior angles. 



a. Angles of the median segment subtuberculate, 



colours black and reddish orange. 

 a 2 . Scutellum totally reddish orange. 



« 3 . First abdominal segment reddish orange. P. concinna, Sm. 

 b 3 . First abdominal segment black ; a small 



reddish-orange spot on each side P. deceptor, Sm. 



i 2 . Scutellum reddish orange on posterior mar- 

 gin only P. pictifrons, Sm. 



b. Angles of median segment rounded. 



a~. First abdomiual segment as broad as 

 second ; colours black and yellow. 

 a 3 . Abdomen wholly yellow P. decipiens, Shuck. 



