112 TRANS. ST. LOUIS ACAD. SCIENCE. 



and in the hind leg the extreme tip of the femur and the whole tibia and 

 tarsus, are pale fuscous. 9. The wings are subhyaline. Length $ .60 

 inch. Front wing $ .36 inch. Length abd. $ .42 inch. Width abd. $ 

 .06 inch. Ovipos. .85 inch. 



One $ ; c? unknown to me. Comes very near pygmceus^ n. sp., 

 but differs notably in the carinse of the metathorax and of the ist 

 abdominal joint being obsolete, in the slenderer abdomen, and in 

 the entirely different proportional length of the first 5 abdominal 

 joints. In this last character it approximates remarkably to occi- 

 dentalism Cress., which is said to have the first 5 abdominal joints 

 subequal ; but it differs from that species by these joints being only 

 twice, instead of thrice, as long as wide, and by the ist, 2d, 3d, 

 4th and 8th characters which separate pusio from gigas. From 

 the other described species it differs like the preceding. 



Ephialtes irritator, Fabr. — $ . — Differ from gigas, n. sp., as follows : — 

 I. The size is nearly i smaller. 2. The palpi are dusky. 3. The tegulae 

 are pure white. 4. The pectus is subglabrous and highly polished. 5. 

 The metathorax is more coarsely and strongly rugoso-punctate, the carinse 

 subobsolete, but with an acute, impressed stria between them extending 



5 of the way to the tip. 6. The abdomen is subpolished, the punctation 

 being less strong; joint i is twice as long as wide, and, as in fygmceus, 

 joints 2-5 are each about \ shorter than the preceding. Joint i black, the 

 remainder rufous, 2-4 each with a short, transverse, black spot at the la- 

 teral tip. Venter, except the basal \ of joint i, dull pale rufous. 7. The 

 usual tubercles are distinct on 2-5, but, except on 2, round instead of elon- 

 gate. 8. The ovipositor is piceous. 9. The legs are pale rufous, with all 



6 coxae and the basal trochanters of the hind leg biack; both trochanters 

 of the front leg, the 2d and all but the lower surface of the basal trochan- 

 ter of the middle leg, all 6 knees, and the tibiae and tarsi of the 4 front 

 legs, yellowish-white; hind tibiae and tarsi pale dull rufous. 10. The 

 wings are subhyaline, and it is only the base of the radius that is pale ru- 

 fous, and the stigma is entirely black. Length $ .64-.70 inch (.98 inch 

 BruUe). Front wing $ .S3--54 inch. Length abd. $ .41-47 inch. Width 

 abd. $ .07 inch. Ovipos. .84-.85 inch (1.18 inch Brull^). 



Two 2 ; S unknown to me. Readily distinguished from all 

 the preceding, and from occidentalism Cress., and manifestator 

 (Europe), by the rufous abdomen. Eph. rufescens^ Cress., dif- 

 fers in having the ist abdominal joint rufous instead of black, but 

 a single pair of black spots on the abdomen, and by its rufous 

 head and thorax. It is remarkable that Eph. oculatus (South 

 Africa) has the same 6 abdominal spots that irritator has, though 

 it is otherwise quite different. None of the other species described 

 by BruU^ exhibit this character. According to Brulle, irritator 



