Vol. XXXl] ENTOMOLOGICAL NEWS I4I 



The Williamson Expedition in Venezuela 



The following note from Mr. E. B. Williamson, dated Puerto Cabello, 

 March 25, 1920, supplements that on page 108 of the April News: "Ar- 

 rived here this a. m. en route to Maracaibo. Have collected at San 

 Esteban, La Mona, Bejuma, Xirgua, San Felipe and from Barquisimeto 

 and Aroa to Tucacas, finding practically one fauna — one Heteragrion 

 and one Philogenia. Have 119 spp., 8200+specimens. [Odonata.]" 



Sciocoris microphthalmus Flor. in Northern Michigan (Heterop.) 



This little pentatomid is one of the rarest and most interesting members 

 of the North American heteropterous fauna but less than a half dozen 

 definite locality records are known to me at the present time. Van Duzee 

 (Trans. Am. Ent. Soc, XXX, 1904, 32) records a single specimen from the 

 White Mountains in Xew Hampshire and Parshley (Fauna of New Eng- 

 land, 14, 1917, 17) records a specimen from Maine. To these localities 

 I am glad to add another thus making known the further distribution of 

 this insect within our borders. 



During the summer of 1919, I took four specimens of Sciocoris microph- 

 thalmus in the Douglas Lake region of northern Michigan. One of these, 

 a male was taken in the sweep net on July 9, and again on July 18, a male 

 and a female were swept from roadside weeds growing in a wooded area 

 along the edge of a small stream. One nymph, a male about one-third 

 grown, was also taken on July 29, in a similar situation. 



Douglas Lake is located in the southern peninsula of Michigan about 

 seventeen miles south of the Straits of Mackinac, the same distance from 

 Lake Huron on the east and Lake Michigan on the west; it is about 200 

 feet above sea level. — Daytox Stoxer, University of Iowa, Iowa City, 

 Iowa. 



Entomological Literature. 



COMPILED BY E. T. CRESSON. JR., AND J. A. G. REHN. 



Under the above head it is intended to note papers received at the Academy of Natural 

 Sciences, of Philadelphia, pertaining to the Entomologj- of the Americas (North and 

 South), including Arachnida and Myriopoda. Articles irrelevant to American ento- 

 mology will not be noted; but contributions to anatomy, physiology and embryology of 

 insects, however, whether relating to American or exotic species, will be recorded. 



The numbers in Heavy-Faced Type refer to the journals, as numbered in the follow-ing 

 list, in which the papers are published. 



AH continued papers, with few exceptions, are recorded only at their first installments. 



The records of papers containing new genera or species occurring north of Mexico are 

 all grouped at the end of each Order of which they treat. 



For records of Economic Literature, see the Experiment Station Record, Office of Ex- 

 periment Stations. Washington. .-Mso Review of Applied Entomology, Series A, London. 

 For records of papers on Medical Entomology, see Review of Applied Entomologj'. Series B. 



4 — Canadian Entomologist, London, Canada. 5 — Psyche, Cambridge, 

 Mass. 9 — The Entomologist, London. 10 — Proceedings of the Ento- 

 mological Society of Washington, D. C. 11 — Annals and Magazine of 



