38 ENTOMOLOGICAL NEWS. |Keb.,'l() 



Gynacantha gracilis Burmeister. Cayuga, forest, September 4, 

 ] 9. This is the most northern locality for this species yet re- 

 corded; I have taken it also in Costa Rica, in the Banana River 



country.* 



EXPLANATION OF PLATE III. 



Figs. 1-6, Erpeto-gomphus schausi n. sp., type $, Purulha, Guate- 

 mala, July 7. Figs, i, Dorsal, and 2, Right lateral views of the meso- 

 metathorax showing the color pattern, x 6.6. Figs. 3, Dorsal, and 6. 

 Left lateral, views of the apex of the abdomen, x 7. Fig. 4, Right 

 lateral view of penis and vesicle removed from the other genitalia of 

 the s-econd abdominal segment, inverted. Fig. 5, Right lateral view of 

 genitalia of the second abdominal segment, inverted, penis lying be- 

 tween the hamules of the right and left sides; all, anterior, and ph, 

 posterior, hamules ; Tp, vesicles of the penis, ah' , anterior hamule viewed 

 antero-laterally to show form of apex; am III, anterior margin of 

 abdominal segment 3. Figs. 4-5 x 14.3. 



Figs. 7-9, Erpetogomphus diadophis Calvert, $ paratype, Texas. 

 Figs. 7, Dorsal, and 8, Right lateral views of meso-metathorax showing 

 the color pattern, x 6. Fig. 9, Sternite of abdominal segment 8 and 

 part of groove (</) on sternite of segment 9. x 12. 



Figs. 10-12, Erpetogomphus diadophis ? ? Cayuga, Guatemala, Oct. 

 25. Figs. 10, Dorsal, and n, Right lateral views of meso-metathorax 

 showing the color pattern, x 6.5. Fig. 12, posterior part of abdominal 

 segment 8 and all of segment 9, ventral view, x 12.75. 



In figs. 9 and 12: a, anterior of the two transverse impressions, and 

 t, transverse groove, cephalad of the vulvar lamina (r/) (see page 36) ; 

 g, semicircular groove on sternite of 9. 



All these figures are based on camera lucida drawings, using a Zeiss 

 compound microscope with objective A (its lower lens off), and ocular 

 2 (figs. 4, 5, 9 and 12), or compensating ocular 2 (the remaining fig- 

 ures). 



(To be continued) 



Swarming of the Monarch Butterfly in Iowa (Lep.). 



While driving along a country road three miles northwest of Vinton, 

 Iowa, on Sept. 8, 1918, a swarm of Monarch butterflies (Aiiosia plc.rip- 

 pus Linn.) attracted my attention. The immediate region is hilly, ouce 

 wooded, but now only small white oak groves scattered here and there 

 remind one of that fact. At least several hundred butterflies were in 

 this swarm, which, at the time of my observation, did not seem to be 

 moving in any particular direction. Some of the individuals were 

 flying about rather aimlessly a few feet above the ground, while others 

 had alighted on the leaves and branches of the white oak trees. The 

 observation was made at 6.10 P. M., and it is probable that the insects 

 were preparing to settle for the night. The weather was partly cloudy 

 and there was little or no breeze. DAYTON STONER, State University 

 of Iowa, Iowa City, Iowa. 



* Calvert, A. S. & P. P. A Year of Costa Rican Natural History, 

 New York (Macmillan), pp. ::i5-3is. 1917. 



