322 SPHEGID^. 



c'. Enclosed space at base of meriian seg-- 

 meut coarsely reticulate ; 3rd, 4th, 

 and 5th abdominal segments marked 

 with bright yellow C. buddha, p. 323. 



d'. Enclosed space at base of median seg- 

 ment coarsely obliquely striate ; sides 

 smooth ; 2nd and 4th abdominal seg- 

 ments with oblique spots, 5th with a 

 transverse band greenish yellow .... C. orientalis, p. 324. 



e. Enclosed space at base of median seg- 

 ment very smooth, polished, and 

 shining; sides punctured; 1st, 2nd, 

 4th, 5th, and 6th abdominal segments 



marked with yellow C.flavopictus, p. 324. 



h. Petiole short, sub-pyriform, gradually 

 widened from base to apex. 



«'. Basal joint of anterior tarsi twisted, 



dilated, and dentate at base C. odontophorus, p. 325. 



V . Basal joint of anterior tarsi normal, not 



twisted C. ardens, p. 325. 



B. Abdomen non-petiolate. 



a. Mesonotuni longitudinally striate. 



a . Abdomen with the 2nd, 3rd, and 4th 



segments with lateral yellow spots : 



L. 10 mm C. sodalis, p. 326. 



b' . Abdomen, 1st segment with a yellow 



transverse baud emitting a quadrate 



spot anteriorly ; 2nd to 5th seg- 

 ments with transverse yellow fascije : 



L. 14 mm C. insigiiis, p. 326. 



c'. Abdomen, segments 1-4 with lateral 



yellow spots ; 5th segment with a 



transverse yellow band : L. 7-8 mm. C. spinifrons, p. 327. 



b. Mesonotum anteriorly transversely, poste- 



riorly obliquely striate C. auricomus, p. 327. 



c Mesonotum punctured. 



a'. Enclosed triangular space at base of 



median segment reticulate C. quadriceps, p. 327. 



b'. Enclosed triangular space at base of 



median segment longitudinally striate. 



a-. Abdomen with the apical margins of 



segments 1-5 narrowly reddish, 



bases of segments 2-5 lined with 



silvery pile C. argentatus, p. 328. 



i^. Abdomen with lateral yellow spots 



on segments 1-5 C. bellus, p. 328. 



c' . Enclosed triangular space at base ot 

 median segment obliquely striate. 

 a^, Mesonotum densely and minutely 



punctured, opaque-looking C. palitans, p. 329. 



b-. Mesonotum lightly punctured C. fuscipennis, p. 329. 



d. Mesonotum with two short, medial, longi- 



tudinally-impressed Unes anteriorly, and 



a deep round fovea on each side of them. C. nanus, p. 330. 



e. Mesonotum smooth and shining, not punc- 



tured or striate C. nitidus, p. 330. 



